o.yaml

- name: Open Test Drive Unlimited
  originals:
  - Test Drive Unlimited
  type: remake
  repo: 'https://github.com/opentestdriveunlimited/OpenTestDriveUnlimited'
  development: very active
  status: unplayable
  licenses:
  - As-is
  langs:
  - C++
  - C
  frameworks:
  - Vulkan
  added: 2025-10-19
  updated: 2025-10-19

- name: O21
  images:
  - https://github.com/ForNeVeR/O21/raw/main/docs/screenshot.png
  langs:
  - F#
  licenses:
  - CC-BY
  - MIT
  - OFL
  - WTFPL
  content: commercial
  development: active
  originals:
  - U95
  status: semi-playable
  repo: https://github.com/ForNeVeR/O21
  type: remake
  updated: 2025-05-19

- name: Oblast
  originals:
  - Blasto
  type: clone
  repo: 'https://github.com/classilla/oblast'
  url: >-
    https://oldvcr.blogspot.com/2025/12/oblast-better-blasto-game-for-commodore.html
  feed: 'https://github.com/classilla/oblast/releases.atom'
  development: very active
  status: playable
  multiplayer:
  - Local
  content: open
  langs:
  - Assembly
  - BASIC
  licenses:
  - Custom
  added: 2025-12-08
  updated: 2025-12-08
  images:
  - https://raw.githubusercontent.com/classilla/oblast/main/pics/vice-screen-2025112520513488.png
  - https://raw.githubusercontent.com/classilla/oblast/main/pics/vice-screen-2025112522101417.png
  - https://raw.githubusercontent.com/classilla/oblast/main/pics/vice-screen-2025112521430338.png

- name: Octopus
  images:
  - https://cloud.githubusercontent.com/assets/16686245/12429085/98761c3c-bee8-11e5-9399-1f7cc162e9bd.png
  info: Apple TV 4 required
  langs:
  - Swift
  licenses:
  - As-is
  content: commercial
  development: halted
  originals:
  - Octopus
  status: playable
  repo: https://github.com/roger-wetzel/Octopus
  type: remake
  updated: 2016-02-08

- name: OceanPop
  images:
  - https://raw.githubusercontent.com/sharkwouter/oceanpop/1.0/screenshot.jpg
  langs:
  - C++
  licenses:
  - MIT
  development: active
  originals:
  - HuniePop
  info: HuniePop without the Hunnies
  repo: https://github.com/sharkwouter/oceanpop
  status: playable
  type: clone
  updated: 2022-10-23

- name: Odamex
  langs:
  - C
  licenses:
  - GPL2
  development: active
  originals:
  - Doom
  - Heretic
  - Hexen
  repo: https://github.com/odamex/odamex
  status: playable
  type: remake
  url: https://odamex.net
  updated: 2019-11-20
  images:
  - https://odamex.net/w/images/thumb/8/8b/Odamex-r103-winxp.png/640px-Odamex-r103-winxp.png
  - https://odamex.net/w/images/thumb/b/be/Odamex-r86-fbsd62.png/640px-Odamex-r86-fbsd62.png
  - https://odamex.net/w/images/thumb/8/8d/Odamex-r100-openbsd.png/640px-Odamex-r100-openbsd.png
  - https://odamex.net/w/images/thumb/8/8c/Odamex-r120-solaris.png/640px-Odamex-r120-solaris.png
  - https://odamex.net/w/images/thumb/0/01/Odamex-r166-linuxppc.png/640px-Odamex-r166-linuxppc.png
  - https://odamex.net/w/images/thumb/7/74/Odamex-r166-osxppc.png/640px-Odamex-r166-osxppc.png

- name: OGame Vue TS
  originals:
  - OGame
  type: clone
  repo: 'https://github.com/setube/ogame-vue-ts'
  url: 'https://ogame-vue-ts.wenzi.games/'
  feed: 'https://github.com/setube/ogame-vue-ts/releases.atom'
  development: very active
  status: playable
  content: free
  langs:
  - TypeScript
  - Vue
  frameworks:
  - Vue.js
  licenses:
  - CC-BY-NC
  added: 2025-12-28
  updated: 2025-12-28

- name: Ogrian Carpet
  originals:
  - Magic Carpet
  type: similar
  repo: 'https://sourceforge.net/projects/ogrian/'
  url: https://ogrian.sourceforge.net
  development: halted
  status: playable
  content: open
  langs:
  - C++
  licenses:
  - MIT
  updated: 2021-08-10
  images:
  - https://a.fsdn.com/con/app/proj/ogrian/screenshots/28162.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/ogrian/screenshots/28168.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/ogrian/screenshots/28166.jpg/max/max/1

- name: Olympia PBEM
  originals:
  - Olympia PBEM
  type: official
  repo: 'https://sourceforge.net/projects/olympiapbem/'
  feed: 'https://sourceforge.net/p/olympiapbem/code/feed/'
  development: halted
  status: playable
  multiplayer:
  - Online
  langs:
  - C
  licenses:
  - BSD
  info: >-
    A computer moderated play-by-electronic-mail (PBEM) fantasy simulation,
    open-sourced in May 2009.
  added: 2026-03-12
  updated: 2026-03-12

- name: 'Olympia: The Age of Gods PBEM'
  originals:
  - Olympia PBEM
  type: remake
  repo: 'https://github.com/olytag/Olympia--The-Age-of-Gods-PBEM'
  url: 'https://www.pbm.com/oly/tag/'
  development: halted
  status: playable
  multiplayer:
  - Online
  langs:
  - C
  licenses:
  - BSD
  info: Updated and enhanced Olympia PBEM
  added: 2026-03-14
  updated: 2026-03-14

- name: Omega Race Remake
  langs:
  - C#
  frameworks:
  - XNA
  licenses:
  - As-is
  development: halted
  originals:
  - Omega Race
  status: unplayable
  repo: https://github.com/UnforgivenRob/Omega-Race-Remake
  type: clone
  updated: 2015-05-29

- name: Omnispeak
  images:
  - https://davidgow.net/images/omnispeak-3.png
  - https://davidgow.net/images/omnispeak-4.png
  - https://davidgow.net/images/omnispeak-5.png
  langs:
  - C
  frameworks:
  - OpenGL
  licenses:
  - GPL2
  content: commercial
  development: sporadic
  originals:
  - Commander Keen Series
  status: playable
  repo: https://github.com/sulix/omnispeak
  type: remake
  updated: 2021-12-01
  url: https://davidgow.net/keen/omnispeak.html

- name: One Way To Go
  images:
  - https://a.fsdn.com/con/app/proj/onewaytogo/screenshots/screenshot_zps0048f6d4.PNG
  - https://a.fsdn.com/con/app/proj/onewaytogo/screenshots/owtg_zpsc6792600.PNG
  langs:
  - Lua
  licenses:
  - GPL3
  development: halted
  originals:
  - Sensitive
  status: semi-playable
  type: remake
  updated: 2019-11-20
  url: https://gordebak.itch.io/onewaytogo

- name: The Only One Project
  originals:
  - Legend of Zelda - A Link to the Past
  type: clone
  repo: 'https://github.com/KaKaShUruKioRa/The-Only-One-Project'
  url: 'https://www.solarus-games.org/games/the-only-one-project/'
  feed: 'https://github.com/KaKaShUruKioRa/The-Only-One-Project/releases.atom'
  development: halted
  status: playable
  content: free
  langs:
  - Lua
  frameworks:
  - Solarus
  licenses:
  - CC-BY-SA
  - GPL3
  added: 2025-10-07
  updated: 2025-10-10
  images:
  - https://www.solarus-games.org/games/the-only-one-project/screen1.png
  - https://www.solarus-games.org/games/the-only-one-project/screen2.png
  - https://www.solarus-games.org/games/the-only-one-project/screen3.png
  - https://www.solarus-games.org/games/the-only-one-project/screen4.png
  - https://www.solarus-games.org/games/the-only-one-project/screen5.png
  - https://www.solarus-games.org/games/the-only-one-project/screen6.png
  - https://www.solarus-games.org/games/the-only-one-project/screen7.png
  - https://www.solarus-games.org/games/the-only-one-project/screen8.png

- name: Onslaught
  originals:
  - Teddy Boy
  type: clone
  repo: 'https://github.com/mattgodbolt/onslaught'
  url: 'https://bbcmicro.co.uk/game.php?id=2580'
  development: halted
  status: semi-playable
  content: open
  langs:
  - Assembly
  licenses:
  - MIT
  added: 2025-12-27
  updated: 2025-12-27
  images:
  - https://raw.githubusercontent.com/mattgodbolt/onslaught/main/onslaught.png
  - https://www.stairwaytohell.com/lostandfound/Onslaught-scr.gif
  - https://www.stairwaytohell.com/lostandfound/Onslaught-0-scr.gif

- name: Oolite
  images:
  - https://camo.githubusercontent.com/7891aa32f19781623450c1a790611998ca9af4fc8b1c45ef2f73483ededc7524/687474703a2f2f6f6f6c6974652e6f72672f696d616765732f67616c6c6572792f6c617267652f616e6f746865725f636f6d6d616e6465722d3231303231305f4c656176696e67436f72696f6c6973416761696e2e706e67
  licenses:
  - GPL2
  development: active
  originals:
  - Elite
  status: playable
  repo: https://github.com/OoliteProject/oolite
  type: clone
  url: http://www.oolite.org/
  updated: 2018-10-06

- name: Open Adventure
  originals:
  - Colossal Cave Adventure
  type: remake
  repo: 'https://gitlab.com/esr/open-adventure'
  url: 'http://www.catb.org/~esr/open-adventure/'
  feed: 'https://gitlab.com/esr/open-adventure.atom'
  development: sporadic
  status: playable
  langs:
  - C
  licenses:
  - BSD2
  added: 2026-01-02
  updated: 2026-01-02

- name: Open Arkanoid
  originals:
  - Arkanoid
  type: clone
  repo: 'https://sourceforge.net/projects/openarkanoid/'
  feed: 'https://sourceforge.net/projects/openarkanoid/rss?path=/'
  development: halted
  status: playable
  content: open
  langs:
  - BlitzMax
  frameworks:
  - OpenGL
  licenses:
  - GPL2
  added: 2025-12-07
  updated: 2025-12-07
  images:
  - 'https://a.fsdn.com/con/app/proj/openarkanoid/screenshots/55686.jpg'

- name: Open BattleChess
  langs:
  - C#
  licenses:
  - As-is
  development: halted
  originals:
  - Battle Chess
  status: unplayable
  repo: https://github.com/blueveno/openbattlechess
  type: remake
  updated: 2019-03-29

- name: Open Blades of Exile
  originals:
  - Blades of Exile
  type: remake
  repo: https://k7izh9.gitea.cloud/openboe/oboe
  url: 'http://openboe.com'
  feed: https://k7izh9.gitea.cloud/openboe/oboe.atom
  development: sporadic
  status: playable
  content: open
  langs:
  - C++
  frameworks:
  - SFML
  licenses:
  - GPL2
  info: Source port that supports modern operating systems
  added: '2025-03-14'
  updated: '2026-01-06'
  images:
  - 'https://libregamewiki.org/images/6/62/Blades_of_Exile_-_combat1.png'

- name: OpenBOR
  type:  clone
  originals:
  - Streets of Rage
  - Double Dragon
  - Final Fight
  repo: https://github.com/DCurrent/openbor
  url: https://www.chronocrash.com/forum/#openbor.12
  development: sporadic
  status: playable
  langs:
  - C
  frameworks:
  - SDL2
  licenses:
  - BSD
  content: free
  info: OpenBOR is the ultimate 2D side scrolling engine for beat em' ups, shooters, and more!
  updated: 2019-09-23
  video:
    youtube: TbZD1pWsJeI

- name: OpenBW
  originals:
  - StarCraft
  type: remake
  content: commercial
  status: unplayable
  langs:
  - C++
  licenses:
  - As-is
  development: halted
  repo: https://github.com/OpenBW/openbw
  url: http://www.openbw.com/
  added: 2022-08-15
  updated: 2024-06-16
  video:
    youtube: AQUYZHsdhFk

- name: openc2e
  langs:
  - C++
  licenses:
  - LGPL2
  - GPL2
  development: sporadic
  originals:
  - Creatures
  status: unplayable
  repo: https://github.com/openc2e/openc2e
  type: remake
  updated: 2020-05-05
  url: https://creatures.wiki/Openc2e
  images:
  - https://creatures.wiki/images/d/df/C2-vista-injector.jpg
  - https://creatures.wiki/images/2/22/Openc2e-c1-april2008.jpg

- name: Open Fodder
  langs:
  - C++
  licenses:
  - GPL3
  development: sporadic
  originals:
  - Cannon Fodder
  repo: https://github.com/OpenFodder/openfodder
  status: playable
  type: remake
  updated: 2022-11-29
  url: http://openfodder.com/
  images:
  - https://user-images.githubusercontent.com/1327406/49718991-f1bd6e00-fcaf-11e8-88e3-68136828c2d1.png

- name: OpenGOAL
  originals: 
  - 'Jak and Daxter: The Precursor Legacy'
  type: remake
  repo: https://github.com/open-goal/jak-project
  feed: https://github.com/open-goal/jak-project/releases.atom
  url: https://opengoal.dev/
  development: very active
  status: playable
  content: commercial
  langs:
  - C++
  - Common Lisp
  licenses:
  - ISC
  info: >-
    A project that aims to provide a complete PC port for the first Jak and 
    Daxter game by providing a open implementation of a compiler for Naughty
    Dog's GOAL language, a decompiler for the compiled game and an asset
    extraction tool.
  added: '2022-08-28'
  updated: 2024-06-07
  images:
  - https://opengoal.dev/assets/images/lurker-chilling_2022-02-04-93d12659deb4cd4cdadda716de276725.png
  - https://opengoal.dev/assets/images/jak-and-daxter-are-stunned_2022-02-04-12bbd4d7353f20638b9f1994ff8cbe24.png
  - https://opengoal.dev/assets/images/robotboss-appears_2022-02-04-2455f3b01898dd59e806044daa8ee017.png
  video:
    youtube: ZO7A22btJc0

- name: Open Greedy
  originals:
  - Pac-Man
  type: remake
  repo: https://github.com/atroel/open-greedy
  url: https://troel.net/opengreedy/
  development: halted
  status: playable
  content: free
  langs:
  - C
  frameworks:
  - SDL2
  licenses:
  - GPL2
  info: >-
    This is an engine recreation of a Pac-Man clone called Greedy by French
    demogroup Eclipse. Originally written for DOS and sold as shareware, Greedy
    was later ported to Windows and eventually made a free, but not open source
    game. Open Greedy attempts to recreate the game's engine for proper
    cross-platform compatibility.
  updated: 2021-08-18
  images:
  - https://troel.net/opengreedy/menu_thumbnail.png
  - https://troel.net/opengreedy/greedy_xp_01_thumbnail.png
  - https://troel.net/opengreedy/credits_thumbnail.png

- name: Open Hexagon
  images:
  - https://vittorioromeo.info/Resources/img/openHexagon.png
  langs:
  - C++
  licenses:
  - AFL3
  development: sporadic
  originals:
  - Super Hexagon
  repo: https://github.com/SuperV1234/SSVOpenHexagon
  status: playable
  type: clone
  updated: 2013-09-11
  url: https://vittorioromeo.info/projects.html
  video:
    youtube: Wth0Z2eMezE

- name: Open Horizon
  frameworks:
  - nya-engine
  images:
  - https://camo.githubusercontent.com/1b2f1c9e758639b57b2a123204f3211de2e490a357ac37c83f08056e7da9f757/687474703a2f2f7a7873747564696f2e6f72672f626c6f672f77702d636f6e74656e742f75706c6f6164732f323031362f30312f6f70656e2d686f72697a6f6e2d656666656374732e706e67
  - https://camo.githubusercontent.com/d5b184385d506a125227319be547d4e0cdbb75f2a5724e427d44e6b267edae7f/687474703a2f2f7a7873747564696f2e6f72672f626c6f672f77702d636f6e74656e742f75706c6f6164732f323031362f30372f4d697373696f6e30312e706e67
  - https://camo.githubusercontent.com/3c5f8dbdaa0c156b984c38488c3a9edfd0c84705ed3aeff6a454347824c11222/687474703a2f2f7a7873747564696f2e6f72672f626c6f672f77702d636f6e74656e742f75706c6f6164732f323031362f30372f4d697373696f6e30332e706e67
  langs:
  - C++
  licenses:
  - MIT
  content: commercial
  development: halted
  status: semi-playable
  originals:
  - 'Ace Combat: Assault Horizon'
  repo: https://github.com/undefined-darkness/open-horizon
  type: remake
  updated: 2021-02-25
  url: http://zxstudio.org/blog/author/razgriz/

- name: Open Imperium Galactica
  langs:
  - Java
  licenses:
  - LGPL3
  content: free
  development: active
  originals:
  - Imperium Galactica
  repo: https://github.com/akarnokd/open-ig
  feed: https://github.com/akarnokd/open-ig/releases.atom
  status: playable
  type: remake
  added: 2013-12-11
  updated: 2024-06-18
  url: https://open-ig-dev.blogspot.com
  images:
  - https://raw.githubusercontent.com/akarnokd/open-ig/master/src/hu/openig/gfx/OpenIG_Splash_medium.png
  video:
    youtube: FnlIEwW2OkM

- name: Open Invaders
  originals:
  - Space Invaders
  type: clone
  repo: 'https://sourceforge.net/projects/open-invaders/'
  feed: 'https://sourceforge.net/projects/open-invaders/rss?path=/'
  development: halted
  status: semi-playable
  content: open
  langs:
  - C++
  frameworks:
  - Allegro
  licenses:
  - GPL2
  added: 2025-08-06
  updated: 2025-08-06
  images:
  - https://img-games.lisisoft.com/img/1/8/1822-1-open-invaders.jpg
  - https://img-games.lisisoft.com/img/1/8/1822-2-open-invaders.jpg
  - https://img-games.lisisoft.com/img/1/8/1822-3-open-invaders.jpg

- name: openjazz.github.io
  originals:
  - Jazz Jackrabbit
  type: remake
  repo: 'https://github.com/OpenJazz/openjazz.github.io'
  url: 'https://openjazz.github.io'
  development: active
  status: playable
  content: free
  langs:
  - JavaScript
  licenses:
  - Custom
  info: Play Jazz Jackrabbit in your browser!
  added: '2024-09-21'
  updated: '2024-09-21'

- name: OpenJill
  originals:
  - Jill of the Jungle
  type: remake
  repo: 'https://github.com/emeric-martineau/openjill'
  development: halted
  status: semi-playable
  content: commercial
  langs:
  - Java
  licenses:
  - MPL
  info: 'Open source implementation of Jill Trilogy game engine '
  added: '2025-09-01'
  updated: '2025-09-01'

- name: Open Jumpgate
  langs:
  - C++
  frameworks:
  - OGRE
  licenses:
  - GPL2
  content: open
  development: sporadic
  originals:
  - 'Jumpgate: The Reconstruction Initiative'
  status: unplayable
  type: remake
  updated: 2021-09-17
  repo: https://sourceforge.net/projects/opengate/
  url: https://opengate.sourceforge.net/
  images:
  - https://a.fsdn.com/con/app/proj/opengate/screenshots/299347.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/opengate/screenshots/313299.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/opengate/screenshots/screenshot%5B2013.9.20-0%3A42%3A58%5D-1024-600.png/max/max/1

- name: Open Kick-Off
  type: remake
  originals:
  - Kick Off
  repo: https://github.com/ssenegas/kickoff
  development: halted
  status: playable
  langs:
  - Java
  frameworks:
  - libGDX
  licenses:
  - MIT
  content: open
  added: 2019-03-29
  updated: 2024-06-19
  images:
  - https://user-images.githubusercontent.com/9662172/39470980-0051a248-4d41-11e8-9a60-182320e25b57.PNG

- name: Open-Ko
  originals:
  - Knight Online
  type: remake
  repo: 'https://github.com/Open-KO/KnightOnline'
  development: very active
  langs:
  - C++
  frameworks:
  - DirectX
  status: semi-playable
  content: open
  licenses:
  - MIT
  info: OpenKO is an open source version of the old school Knight Online MMORPG
  added: '2025-12-17'
  updated: '2025-12-17'
  images:
  - https://raw.githubusercontent.com/Open-KO/KnightOnline/refs/heads/master/openko_example.png

- name: OpenLiberty
  info: A open-source Grand Theft Auto III reimplementation on the Godot Engine
  frameworks:
  - Godot
  langs:
  - GDScript
  licenses:
  - MIT
  content: commercial
  development: very active
  originals:
  - Grand Theft Auto III
  repo: https://github.com/FOSS-Supremacy/OpenLiberty
  status: unplayable
  type: remake
  added: 2024-08-18
  updated: 2024-08-18
  images:
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image1.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image2.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image3.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image4.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image5.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image6.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image7.png
  - https://raw.githubusercontent.com/FOSS-Supremacy/re3-gd/main/screenshots/image8.png
  video:
    youtube: Z3Cd_NBYUfI

- name: Open Meridian
  langs:
  - C
  licenses:
  - GPL2
  development: halted
  originals:
  - Meridian 59
  status: playable
  repo: https://github.com/OpenMeridian/Meridian59
  type: remake
  updated: 2015-06-02
  url: https://openmeridian.org
  images:
  - https://openmeridian.org/wp-content/uploads/2014/01/ancient-trinket.png
  - https://openmeridian.org/wp-content/uploads/2014/01/battle-arena.png
  - https://openmeridian.org/wp-content/uploads/2014/01/new-lore.png

- name: OpenOrion2
  originals:
  - Master of Orion 2
  type: remake
  repo: https://github.com/nextghost/openorion2
  development: active
  status: unplayable
  content: commercial
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL2
  added: 2025-06-25
  updated: 2025-06-25

- name: Open Panzer
  images:
  - https://user-images.githubusercontent.com/1650801/74080138-50fc4700-4a49-11ea-8fbc-a571b6d4ce3c.png
  - https://i.imgur.com/NiJGQ.jpg
  licenses:
  - GPL2
  langs:
  - JavaScript
  development: halted
  originals:
  - Panzer General
  status: playable
  repo: https://github.com/nicupavel/openpanzer
  type: remake
  added: 2012-06-29
  updated: 2024-06-20
  url: https://panzermarshal.com

- name: Open Portal Engine
  type: clone
  originals:
  - Portal
  repo: https://github.com/lpuglia/Open-Portal
  development: halted
  status: playable
  langs:
  - C++
  frameworks:
  - OpenGL
  licenses:
  - As-is
  content: free
  added: 2019-05-24
  updated: 2019-05-24
  video:
    youtube: tqqeUCzWcdQ

- name: Open Quartz
  originals:
  - Quake
  type: remake
  repo: 'https://sourceforge.net/projects/openquartz/'
  url: https://openquartz.sourceforge.net/index.html
  development: halted
  status: semi-playable
  multiplayer:
  - Competitive
  - Online
  - LAN
  content: open
  langs:
  - C
  licenses:
  - GPL2
  info: >-
    A project to create a free game data set for the Quake engine, complete with a
    binary executable. Only the multiplayer component has been completed, but it can
    also run Quake mods and custom maps.
  updated: 2021-08-23
  images:
  - https://openquartz.sourceforge.net/images/oq002.jpg
  - https://openquartz.sourceforge.net/images/oq003.jpg
  - https://openquartz.sourceforge.net/images/oq001.jpg

- name: Open Rails
  langs:
  - C#
  frameworks:
  - XNA
  licenses:
  - GPL3
  development: active
  originals:
  - Microsoft Train Simulator
  status: playable
  repo: https://github.com/openrails/openrails
  type: clone
  updated: 2022-10-15
  url: http://openrails.org/
  video:
    youtube: RThvP7OvDxM

- name: Open Rodent's Revenge
  images:
  - https://a.fsdn.com/con/app/proj/o2r/screenshots/254642.jpg
  - https://a.fsdn.com/con/app/proj/o2r/screenshots/254636.jpg
  - https://a.fsdn.com/con/app/proj/o2r/screenshots/254640.jpg
  - https://a.fsdn.com/con/app/proj/o2r/screenshots/267538.jpg
  - https://a.fsdn.com/con/app/proj/o2r/screenshots/255628.jpg
  langs:
  - C++
  frameworks:
  - Qt
  - SFML
  licenses:
  - MIT
  status: semi-playable
  development: halted
  originals:
  - Rodent's Revenge
  repo: https://github.com/pierreyoda/o2r
  type: remake
  updated: 2019-09-01

- name: Open RSC
  type: remake
  originals:
  - RuneScape Classic
  repo: https://gitlab.com/open-runescape-classic/core
  url: https://rsc.vet
  development: active
  status: playable
  multiplayer:
  - Online
  langs:
  - Java
  frameworks:
  - OpenGL
  licenses:
  - AGPL3
  info: Recreation of the discontinued classic variation of the game.
  added: 2019-04-29
  updated: 2024-06-22
  images:
  - https://i.imgur.com/TqshOR4.jpg
  - https://i.imgur.com/yOdxioS.jpg
  - https://i.redd.it/9l3b4v9cbnu21.gif
  video:
    youtube: idePY0rGvvE

- name: Open Sonic
  type: clone
  originals:
  - Sonic the Hedgehog
  repo: https://sourceforge.net/projects/opensnc/files/Open%20Sonic/0.1.4/opensnc-linux-0.1.4.tar.gz/download
  url: https://opensnc.sourceforge.net/home/index.php
  development: halted
  status: playable
  langs:
  - C
  frameworks:
  - Allegro
  licenses:
  - GPL2
  content: commercial
  info: The game development stopped at 2010. Open Surge the official continuation with fully free assets.
  updated: 2019-09-17
  images:
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/0.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/1.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/2.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/4.png
  video:
    youtube: 2ke0ct4rVWY

- name: Open Surge
  images:
  - https://opensurge2d.org/surge-demo.gif
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/4.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/0.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/3.png
  - https://opensnc.sourceforge.net/home/screenshots/0_1_3/9.png
  langs:
  - C
  frameworks:
  - Allegro
  licenses:
  - GPL3
  development: active
  originals:
  - Sonic the Hedgehog
  status: playable
  repo: https://github.com/alemart/opensurge
  type: clone
  updated: 2019-08-27
  url: https://opensurge2d.org

- name: Open Syobon Action
  langs:
  - C++
  frameworks:
  - SDL
  licenses:
  - GPL2
  development: complete
  originals:
  - Shobon no Action
  status: playable
  repo: https://sourceforge.net/projects/opensyobon
  type: remake
  updated: 2022-06-20
  url: https://www.jezng.com/open-syobon-action.js/
  video:
    youtube: rzP0FeBN_AE

- name: OpenDuelyst
  originals:
  - Duelyst
  type: official
  repo: 'https://github.com/open-duelyst/duelyst'
  url: >-
    https://www.rockpapershotgun.com/tactical-card-battler-duelyst-is-now-completely-open-source
  feed: 'https://github.com/open-duelyst/duelyst/releases.atom'
  development: complete
  status: playable
  multiplayer:
  - Online
  content: free
  langs:
  - JavaScript
  - CoffeeScript
  licenses:
  - CC0
  added: 2026-01-03
  updated: 2026-01-03

- name: OpenTrek
  originals:
  - Super Star Trek
  type: clone
  url: >-
    https://web.archive.org/web/20010813184226/http://www.best.com/~shankel/opentrek.html
  development: complete
  status: playable
  content: open
  langs:
  - C++
  frameworks:
  - DirectX
  - OpenGL
  - SVGALib
  licenses:
  - GPL2
  info: A 3d update of the classic "Super Star Trek" game.
  added: 2026-02-06
  updated: 2026-02-06
  images:
  - https://web.archive.org/web/20010614200901im_/http://www.best.com/~shankel/screen2.gif

- name: OpenTS2
  originals:
  - The Sims 2
  type: remake
  repo: 'https://github.com/LazyDuchess/OpenTS2'
  development: active
  status: unplayable
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - Unity
  licenses:
  - MPL
  updated: '2023-02-11'

- name: OpenVic
  originals:
  - Victoria II
  type: remake
  repo: 'https://github.com/OpenVicProject/OpenVic'
  url: 'https://www.openvic.com'
  feed: 'https://github.com/OpenVicProject/OpenVic/releases.atom'
  development: active
  status: unplayable
  content: commercial
  langs:
  - GDScript
  frameworks:
  - Godot
  licenses:
  - GPL3
  updated: '2023-08-28'

- name: Open Zelda
  langs:
  - C++
  licenses:
  - CC-BY-NC-SA
  - Zlib
  development: halted
  originals:
  - Legend of Zelda
  repo: https://github.com/openzelda/openzelda-source
  status: playable
  type: clone
  updated: 2019-09-13
  video:
    youtube: secXtfqKo1c

- name: open-cube
  info: A modification of tesseract so basically Cube 2 with better graphics and developed on github in a modern vcs.
  langs:
  - C++
  frameworks:
  - OpenGL
  - SDL2
  licenses:
  - Zlib
  development: halted
  originals:
  - 'Cube 2: Sauerbraten'
  repo: https://github.com/team-cube/open-cube
  status: semi-playable
  type: remake
  added: 2016-04-20
  updated: 2024-06-24
  url: https://team-cube.github.io

- name: open-heavy-smash
  langs:
  - C++
  licenses:
  - As-is
  development: halted
  originals:
  - Heavy Smash
  status: unplayable
  repo: https://github.com/namelivia/open-heavy-smash
  type: remake
  updated: 2015-05-28

- name: Open76
  originals:
  - Interstate '76
  type: remake
  repo: 'https://github.com/r1sc/Open76'
  development: halted
  status: semi-playable
  content: commercial
  langs:
  - C#
  frameworks:
  - Unity
  licenses:
  - GPL3
  info: A reimplementation in the Unity engine
  updated: 2021-12-05
  images:
  - https://raw.githubusercontent.com/r1sc/Open76/master/Screenshots/sc1.png
  - https://raw.githubusercontent.com/r1sc/Open76/master/Screenshots/sc2.png
  - https://raw.githubusercontent.com/r1sc/Open76/master/Screenshots/sc3.png

- name: openage
  development: active
  frameworks:
  - SDL
  - OpenGL
  images:
  - https://openage.sft.mx/pics/openage_0.png
  - https://openage.sft.mx/pics/openage_2.png
  video:
    youtube: 4GujF6YGSBY
  langs:
  - C++
  - Python
  licenses:
  - GPL3
  content: commercial
  originals:
  - Age of Empires
  - Age of Empires II
  - 'Star Wars: Galactic Battlegrounds'
  repo: https://github.com/SFTtech/openage
  status: semi-playable
  type: remake
  updated: 2019-05-28
  info: We create a modern RTS engine for AoE-style gameplay. Including modding API, curve-based gamestate, a new renderer
    and support for all operating systems.
  url: https://openage.sft.mx

- name: OpenApoc
  langs:
  - C++
  licenses:
  - MIT
  development: very active
  status: semi-playable
  originals:
  - 'X-COM: Apocalypse'
  content: commercial
  frameworks:
  - SDL2
  repo: https://github.com/OpenApoc/OpenApoc
  type: remake
  added: 2015-04-04
  updated: 2024-06-25
  images:
  - https://i.imgur.com/CFS3nBK.png
  video:
    youtube: qMy4dYksZVg

- name: OpenArena
  images:
  - https://openarena.ws/e107_images/custom/085-8.jpg
  - https://openarena.ws/e107_images/custom/085-13.jpg
  - https://openarena.ws/e107_images/custom/085-14.jpg
  - https://openarena.ws/e107_images/custom/085-16.jpg
  langs:
  - C
  licenses:
  - GPL2
  development: sporadic
  originals:
  - Quake 3
  status: playable
  repo: https://github.com/OpenArena/engine
  type: remake
  updated: 2019-08-27
  url: https://openarena.ws/

- name: OpenArena (gladiator management game)
  originals:
  - Areena 5
  type: clone
  repo: 'https://gitlab.com/Mige5/openarena'
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - Java
  licenses:
  - GPL3
  added: '2022-07-20'
  updated: 2024-06-26

- name: OpenAWE
  type: remake
  originals:
  - Alan Wake
  repo: https://github.com/OpenAWE-Project/OpenAWE
  development: active
  status: unplayable
  langs:
  - C++
  licenses:
  - GPL3
  content: commercial
  updated: 2021-07-04
  images:
  - https://raw.githubusercontent.com/OpenAWE-Project/OpenAWE/master/screenshots/awan1.png

- name: OpenBiohazard2
  originals:
  - Resident Evil 2
  type: remake
  repo: 'https://github.com/samuelyuan/OpenBiohazard2'
  url: https://openbiohazard2.github.io/
  feed: https://openbiohazard2.github.io/feed.xml
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - Go
  frameworks:
  - OpenGL
  licenses:
  - MIT
  added: '2021-01-12'
  updated: 2024-06-27
  images:
  - >-
    https://raw.githubusercontent.com/samuelyuan/OpenBiohazard2/master/screenshots/beginning.png
  - >-
    https://raw.githubusercontent.com/samuelyuan/OpenBiohazard2/master/screenshots/inventory.png

- name: openblack
  type: remake
  originals:
  - Black & White
  repo: https://github.com/openblack/openblack
  development: active
  status: unplayable
  langs:
  - C++
  frameworks:
  - SDL2
  - OpenGL
  licenses:
  - GPL3
  content: commercial
  updated: 2019-08-06

- name: OpenBlok
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  development: sporadic
  originals:
  - Tetris
  status: playable
  repo: https://github.com/mmatyas/openblok
  type: clone
  updated: 2018-12-05
  images:
  - https://raw.githubusercontent.com/mmatyas/openblok/master/etc/promo/screenshot01.png

- name: OpenBound
  originals:
  - Gunbound
  type: remake
  repo: 'https://github.com/WickedPeanuts/OpenBound'
  development: halted
  status: playable
  multiplayer:
  - Competitive
  - Online
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - MonoGame
  licenses:
  - GPL3
  info: >-
    This project aims to mimic the older PC versions of Gunbound with optimized
    behavior, engine and gameplay elements.
  added: 2022-05-14
  updated: 2024-06-28
  images:
  - 'https://i.imgur.com/JxkCFWo.png'
  - 'https://i.imgur.com/ErNl96t.png'
  video:
    youtube: kdJmLMMqKg8

- name: OpenBreed
  originals:
  - Alien Breed
  type: remake
  repo: 'https://github.com/mrpetro/OpenBreed'
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - .NET
  - OpenTK
  licenses:
  - As-is
  updated: 2022-04-07
  video:
    youtube: goRUP1GDIGo

- name: OpenBVE
  type: clone
  originals:
  - BVE Trainsim
  repo: https://github.com/leezer3/OpenBVE
  url: https://openbve-project.net/
  development: very active
  status: playable
  langs:
  - C#
  licenses:
  - PD
  content: open
  added: 2019-09-17
  updated: 2024-06-29
  images:
  - https://openbve-project.net/images/driving_1.jpg
  - https://openbve-project.net/images/driving_2.jpg
  - https://openbve-project.net/images/driving_3.jpg

- name: OpenC1
  development: halted
  langs:
  - C#
  licenses:
  - Custom
  content: commercial
  originals:
  - Carmageddon
  repo: https://github.com/jeff-1amstudios/OpenC1
  status: playable
  type: remake
  updated: 2017-02-08
  url: http://www.1amstudios.com/projects/openc1/
  video:
    youtube: 0afl6ruHZgI

- name: OpenCity
  images:
  - https://upload.wikimedia.org/wikipedia/commons/7/77/OpenCity-0.0.5-mainstatusbar.jpg
  - https://upload.wikimedia.org/wikipedia/commons/7/7b/Opencity-0.0.3-textured-terrain.png
  - https://upload.wikimedia.org/wikipedia/commons/5/50/OpenCity0.0.5.png
  langs:
  - C++
  frameworks:
  - SDL
  - OpenGL
  licenses:
  - GPL2
  content: open
  development: halted
  originals:
  - SimCity
  status: playable
  repo: https://sourceforge.net/projects/opencity/
  type: clone
  added: 2015-04-03
  updated: 2021-11-18
  url: http://www.opencity.info/

- name: OpenCiv1
  originals:
  - Civilization
  type: remake
  repo: 'https://github.com/rajko-horvat/OpenCiv1'
  url: 'https://github.com/rajko-horvat/OpenCiv1/wiki'
  development: very active
  status: playable
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - .NET
  - Avalonia
  licenses:
  - MIT
  info: Rewrite of Civilization based on disassembled code
  updated: 2024-03-14
  images:
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot1.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot2.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot3.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot4.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot5.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot6.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot7.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot8.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot9.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot10.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot11.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot12.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot13.png
  - https://raw.githubusercontent.com/rajko-horvat/OpenCiv1/master/src/Resources/Screenshots/Screenshot14.png

- name: OpenClaw
  frameworks:
  - SDL2
  images:
  - https://camo.githubusercontent.com/59ebfcbac962696347f795ba2de4273d8e95cd20/68747470733a2f2f696d672e796f75747562652e636f6d2f76692f696b58514e565f617736382f302e6a7067
  langs:
  - C++
  licenses:
  - GPL3
  originals:
  - Claw
  status: playable
  repo: https://github.com/pjasicek/OpenClaw
  development: halted
  type: remake
  added: 2017-09-08
  updated: 2024-06-30
  video:
    youtube: ikXQNV_aw68

- name: OpenClonk
  langs:
  - C++
  frameworks:
  - SDL2
  - OpenGL
  - Qt
  licenses:
  - ISC
  development: halted
  status: playable
  multiplayer:
  - Online
  - LAN
  originals:
  - Clonk
  repo: https://github.com/openclonk/openclonk
  type: remake
  added: 2012-04-08
  updated: 2024-07-01
  url: https://www.openclonk.org/
  video:
    youtube: zydiZSXpn0w

- name: OpenCrystalCaves
  images:
  - https://raw.githubusercontent.com/gurka/OpenCrystalCaves/master/screenshots/animation.gif
  - https://github.com/gurka/OpenCrystalCaves/raw/master/screenshots/screenshot3.png?raw=true
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - MIT
  content: free
  originals:
  - Crystal Caves
  status: unplayable
  repo: https://github.com/gurka/OpenCrystalCaves
  development: sporadic
  type: remake
  added: 2017-09-08
  updated: 2024-07-02

- name: OpenD2
  development: halted
  images:
  - https://i.imgur.com/RFNbRiT.png
  info: Needs original Diablo II game data
  langs:
  - C++
  frameworks:
  - SDL2
  - OpenGL
  licenses:
  - GPL3
  content: commercial
  originals:
  - Diablo II
  repo: https://github.com/eezstreet/OpenD2
  status: unplayable
  type: remake
  added: 2018-06-17
  updated: 2024-07-03

- name: openDarkEngine
  images:
  - https://a.fsdn.com/con/app/proj/opde/screenshots/51078.jpg/182/137
  - https://a.fsdn.com/con/app/proj/opde/screenshots/50724.jpg/182/137
  langs:
  - C++
  licenses:
  - GPL2
  development: halted
  originals:
  - Thief
  repo: https://github.com/volca02/openDarkEngine
  status: unplayable
  type: remake
  updated: 2016-11-30

- name: OpenDaed
  originals:
  - The Daedalus Encounter
  type: remake
  repo: 'https://github.com/AMDmi3/opendaed'
  development: halted
  status: unplayable
  content: commercial
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  added: 2025-11-21
  updated: 2025-11-21

- name: OpenDeathValley
  langs:
  - C
  licenses:
  - GPL3
  development: halted
  originals:
  - 'Desperados: Wanted Dead or Alive'
  status: unplayable
  repo: https://github.com/OpenDeathValley/OpenDeathValley
  type: remake
  updated: 2016-06-15

- name: opendf
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  development: halted
  originals:
  - 'The Elder Scrolls II: Daggerfall'
  repo: https://github.com/kcat/opendf
  status: unplayable
  type: remake
  added: 2015-07-17
  updated: 2024-07-04
  images:
  - https://forum.openmw.org/download/file.php?id=628&mode=view

- name: OpenDiablo2
  type: remake
  originals:
  - Diablo II
  repo: https://github.com/OpenDiablo2/OpenDiablo2
  url: https://opendiablo2.com/
  development: halted
  status: semi-playable
  langs:
  - Go
  frameworks:
  - Ebitengine
  licenses:
  - As-is
  content: commercial
  info: Superceded by AbyssEngine. Needs original Diablo II + Lord of Destruction game data.
  added: 2019-05-07
  updated: 2024-07-05
  images:
  - https://raw.githubusercontent.com/OpenDiablo2/OpenDiablo2/master/docs/MainMenuSS.png
  - https://raw.githubusercontent.com/OpenDiablo2/OpenDiablo2/master/docs/SelectHeroSS.png

- name: OpenDominion
  type: clone
  originals:
  - Dominion
  repo: https://github.com/OpenDominion/OpenDominion
  url: https://beta.opendominion.net/
  development: active
  status: playable
  multiplayer:
  - Online
  langs:
  - PHP
  frameworks:
  - Laravel
  licenses:
  - AGPL3
  content: open
  info: The project is a text-based PBBG (Persistant Browser-Based Game) played in the web browser on both desktop and mobile.
  updated: 2020-08-31

- name: openDOW
  langs:
  - C
  frameworks:
  - SDL
  licenses:
  - GPL3
  content: commercial
  development: halted
  originals:
  - Dogs of War
  status: semi-playable
  repo: https://github.com/rofl0r/openDOW
  type: remake
  updated: 2022-10-06

- name: OpenDR
  originals:
  - 'Dark Reign: The Future of War'
  type: remake
  repo: 'https://github.com/drogoganor/OpenDR'
  feed: https://github.com/drogoganor/OpenDR/releases.atom
  development: halted
  status: semi-playable
  content: free
  langs:
  - 'C#'
  frameworks:
  - OpenRA
  licenses:
  - GPL3
  info: >-
    A work-in-progress recreation of the Auran RTS classic for the OpenRA strategy
    game engine.
  added: '2022-11-02'
  updated: 2024-07-08
  images:
  - >-
    https://uploads.golmedia.net/uploads/articles/article_media/15060194471666886645gol1.jpg
  - https://raw.githubusercontent.com/drogoganor/OpenDR/master/mods/dr/reference/images/mainmenu.jpg

- name: OpenDrakan
  development: sporadic
  info: Needs original game data
  langs:
  - C++
  frameworks:
  - OpenSceneGraph
  licenses:
  - GPL3
  content: commercial
  originals:
  - 'Drakan: Order of the Flame'
  repo: https://github.com/Zalasus/opendrakan
  status: unplayable
  type: remake
  added: 2018-06-17
  updated: 2024-07-09

- name: OpenDUNE
  langs:
  - C
  frameworks:
  - SDL
  - SDL2
  licenses:
  - GPL2
  development: active
  status: playable
  originals:
  - Dune 2
  repo: https://github.com/OpenDUNE/OpenDUNE
  type: remake
  updated: 2021-04-07
  video:
    youtube: TCZuY365tIE

- name: OpenDungeons
  images:
  - https://opendungeons.github.io/media/images/0.7.1_overview1.jpg
  - https://opendungeons.github.io/media/images/0.7.1_main_menu1.jpg
  - https://opendungeons.github.io/media/images/0.7.1_new_rooms1.jpg
  langs:
  - C++
  frameworks:
  - OGRE
  - SFML
  licenses:
  - GPL3
  content: open
  development: halted
  originals:
  - Dungeon Keeper
  status: playable
  repo: https://github.com/OpenDungeons/OpenDungeons
  type: clone
  url: https://opendungeons.github.io/
  added: 2016-10-12
  updated: 2024-07-10

- name: OpenDungeonsPlus
  originals:
  - Dungeon Keeper
  type: clone
  repo: 'https://github.com/tomluchowski/OpenDungeonsPlus'
  url: 'https://snapcraft.io/opendungeons-plus'
  development: active
  status: playable
  content: open
  langs:
  - C++
  frameworks:
  - OGRE
  - SFML
  licenses:
  - GPL3
  info: >-
    a better fork of Opendungeons : with enhanced editor and tile - geometry
    distortions
  updated: '2023-04-14'
  images:
  - >-
    https://dashboard.snapcraft.io/site_media/appmedia/2021/11/Screenshot_2021-11-26_18-53-52.jpg
  - >-
    https://dashboard.snapcraft.io/site_media/appmedia/2021/10/Screenshot_2021-10-12_20-07-10.jpg
  - >-
    https://dashboard.snapcraft.io/site_media/appmedia/2021/10/Screenshot_2021-10-12_20-07-30.jpg
  - >-
    https://dashboard.snapcraft.io/site_media/appmedia/2023/01/Screenshot_2023-01-27_12-23-07_dOnEYHu.jpg
  - 'https://dashboard.snapcraft.io/site_media/appmedia/2023/02/ivUC4Tr.jpeg'

- name: OpenEnroth
  originals:
  - 'Might and Magic VI: The Mandate of Heaven'
  - 'Might and Magic VII: For Blood and Honor'
  - 'Might and Magic VIII: Day of the Destroyer'
  type: remake
  repo: 'https://github.com/OpenEnroth/OpenEnroth'
  development: very active
  status: semi-playable
  content: commercial
  langs:
  - C++
  licenses:
  - LGPL3
  updated: '2023-01-31'
  images:
  - https://user-images.githubusercontent.com/24377109/79051217-491a7800-7c2f-11ea-85c7-f9120b7d79dd.png
  - https://user-images.githubusercontent.com/24377109/79051879-f04cde80-7c32-11ea-939d-1dcc97b46f5d.png
  - https://user-images.githubusercontent.com/24377109/79051881-f17e0b80-7c32-11ea-82cd-5e4993a1c071.png
  - https://user-images.githubusercontent.com/24377109/79051882-f3e06580-7c32-11ea-974f-414f68394190.png
  - https://user-images.githubusercontent.com/24377109/79051883-f5119280-7c32-11ea-801c-1595709d8060.png

- name: OpenE2140
  type: remake
  originals:
  - Earth 2140
  repo: https://github.com/OpenE2140/OpenE2140
  development: active
  status: semi-playable
  langs:
  - C#
  licenses:
  - GPL3
  frameworks:
  - OpenRA
  content: commercial
  info: OpenRA mod
  updated: 2023-12-02
  images:
  - https://dalek.zone/lazy-static/previews/1f3c3fc9-e347-4dfb-94d7-4107a5d2c2a2.jpg
  - https://dalek.zone/lazy-static/previews/4d70f8c5-5b5f-41b1-832f-dd979039172c.jpg

- name: opene2140
  type: remake
  originals:
  - Earth 2140
  repo: https://gitlab.com/opene2140/opene2140
  development: halted
  status: unplayable
  langs:
  - C++
  licenses:
  - GPL3
  frameworks:
  - SDL2
  - OpenGL
  content: commercial
  updated: 2023-01-31
  images:
  - https://user-images.githubusercontent.com/750553/72228544-d22a0080-35a7-11ea-87d0-9c3c72f0454f.png
  - https://user-images.githubusercontent.com/750553/72228576-2b922f80-35a8-11ea-8616-4a40fba55edf.png

- name: OpenEtG
  langs:
  - JavaScript
  - Rust
  licenses:
  - MIT
  development: very active
  originals:
  - Elements
  status: playable
  repo: https://github.com/serprex/openEtG
  type: remake
  added: 2015-09-25
  updated: 2024-07-11
  url: https://etg.dek.im
  video:
    youtube: LSyJiG_wSdg

- name: OpenFire
  langs:
  - C
  licenses:
  - MIT
  content: open
  development: halted
  originals:
  - Fire Power
  status: semi-playable
  repo: https://github.com/Last-Minute-Creations/openFire
  type: clone
  updated: 2020-08-31

- name: OpenFNaF
  originals:
  - Five Nights at Freddy's
  type: clone
  repo: 'https://github.com/MotoLegacy/OpenFNaF'
  development: halted
  status: semi-playable
  content: free
  langs:
  - C
  frameworks:
  - gLib2D
  licenses:
  - MIT
  added: '2020-07-24'
  updated: 2024-07-12

- name: OpenGGS
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL2
  development: halted
  originals:
  - The Great Giana Sisters
  status: playable
  repo: https://github.com/bugix/OpenGGS
  type: remake
  added: 2015-06-28
  updated: 2024-07-14
  images:
  - https://games-cdn.softpedia.com/screenshots/OpenGGS_1.jpg
  - https://games-cdn.softpedia.com/screenshots/OpenGGS_2.jpg
  - https://games-cdn.softpedia.com/screenshots/OpenGGS_3.jpg
  - https://games-cdn.softpedia.com/screenshots/OpenGGS_4.jpg
  - https://games-cdn.softpedia.com/screenshots/OpenGGS_5.jpg

- name: Openglad
  images:
  - https://snowstorm.sourceforge.net/screenshots/1.png
  - https://snowstorm.sourceforge.net/screenshots/2.png
  - https://snowstorm.sourceforge.net/screenshots/3.png
  - https://snowstorm.sourceforge.net/screenshots/4.png
  langs:
  - C++
  frameworks:
  - SDL
  licenses:
  - GPL2
  development: halted
  originals:
  - Gladiator
  status: playable
  repo: https://sourceforge.net/projects/snowstorm/
  type: remake
  url: https://snowstorm.sourceforge.net/cgi-bin/site.cgi?page=openglad
  updated: 2021-04-09

- name: OpenGL Test Drive Remake
  images:
  - https://antongerdelan.net/blog/images/tdrive_wheel.png
  - https://antongerdelan.net/blog/images/tdrive_tacho.png
  - https://antongerdelan.net/blog/images/tdrive_speedo.png
  - https://antongerdelan.net/blog/images/tdrive_end.png
  langs:
  - C
  frameworks:
  - OpenGL
  licenses:
  - GPL3
  content: open
  originals:
  - Test Drive
  status: semi-playable
  repo: https://github.com/capnramses/opengl_test_drive_clone
  development: halted
  type: remake
  updated: 2022-09-14
  url: https://antongerdelan.net/blog/formatted/2014_12_10_test_drive.html

- name: OpenGoo
  langs:
  - C
  licenses:
  - GPL3
  development: halted
  frameworks:
  - Qt
  originals:
  - World of Goo
  repo: https://github.com/Mandarancio/OpenGOO
  status: semi-playable
  type: remake
  updated: 2022-11-29
  url: https://mandarancio.github.io/OpenGOO/
  images:
  - https://mandarancio.github.io/OpenGOO/images/gallery/dimostrativeGoal.thumb.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/debugMode.thumb1.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/onTablet.thumb.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/jointProposal.thumb.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/gooBallons.thumb.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/ballonsAndSticky.thumb.png
  - https://mandarancio.github.io/OpenGOO/images/gallery/tablet.thumb.jpg
  - https://mandarancio.github.io/OpenGOO/images/gallery/gameMenu.thumb.jpg

- name: OpenGothic
  originals:
  - Gothic
  type: remake
  repo: 'https://github.com/Try/OpenGothic'
  feed: 'https://github.com/Try/OpenGothic/releases.atom'
  development: very active
  status: playable
  content: commercial
  langs:
  - C++
  frameworks:
  - DirectX
  - Vulkan
  licenses:
  - MIT
  added: 2019-11-01
  updated: 2024-07-15
  images:
  - https://github.com/Try/OpenGothic/blob/master/scr0.png?raw=true
  - https://user-images.githubusercontent.com/122894/66703709-90be5680-ed15-11e9-8565-476e7a3de8fc.png
  - https://user-images.githubusercontent.com/122894/66703728-ba777d80-ed15-11e9-8bc3-fda0f47e4e21.png
  - https://user-images.githubusercontent.com/122894/64069339-054aa380-cc48-11e9-872b-8161d7600161.png

- name: OpenGTA
  langs:
  - C++
  frameworks:
  - OpenGL
  - SDL
  licenses:
  - Custom
  content: commercial
  development: halted
  originals:
  - Grand Theft Auto
  status: unplayable
  repo: https://github.com/madebr/OpenGTA
  type: remake
  updated: 2021-09-22
  url: http://ogta.fifengine.de/
  images:
  - https://static.wikia.nocookie.net/gtawiki/images/c/c1/OpenGTA-GTA1.jpg

- name: OpenHoW
  type: remake
  originals:
  - Hogs of War
  repo: https://github.com/TalonBraveInfo/OpenHoW
  development: halted
  status: unplayable
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  content: commercial
  added: 2019-05-14
  updated: 2024-07-16
  info: abandoned due to the existence of the official remaster
  images:
  - https://raw.githubusercontent.com/TalonBraveInfo/OpenHoW/master/preview/preview00.png

- name: OpenHV
  images:
  - https://www.openhv.net/images/osgameclones/wayland.png
  - https://www.openhv.net/images/osgameclones/motrylex-purple-base.png
  - https://www.openhv.net/images/osgameclones/business-as-usual-remastered.png
  video:
    youtube: JPlglQtK1gY
  langs:
  - C#
  - Lua
  frameworks:
  - OpenRA
  licenses:
  - GPL3
  - CC-BY
  - CC-BY-SA
  content: open
  multiplayer:
  - Online
  - LAN
  development: active
  status: playable
  originals:
  - Hard Vacuum
  repo: https://github.com/OpenHV/OpenHV
  type: similar
  url: https://openhv.net
  added: 2020-12-30
  updated: 2024-05-12

- name: OpenJazz
  development: sporadic
  frameworks:
  - SDL
  langs:
  - C++
  licenses:
  - GPL2
  content: commercial
  originals:
  - Jazz Jackrabbit
  repo: https://github.com/AlisterT/openjazz
  status: playable
  type: remake
  updated: 2017-10-20
  url: http://www.alister.eu/jazz/oj/

- name: OpenJK
  langs:
  - C++
  licenses:
  - GPL2
  development: active
  originals:
  - 'Star Wars Jedi Knight: Jedi Academy'
  - 'Star Wars Jedi Knight II: Jedi Outcast'
  status: playable
  type: remake
  updated: 2014-08-15
  url: https://github.com/JACoders/OpenJK

- name: OpenJKDF2
  info: Reverse-engineered version of Dark Forces II Engine
  langs:
  - C
  licenses:
  - As-is
  content: commercial
  development: active
  originals:
  - 'Star Wars Jedi Knight: Dark Forces II'
  status: playable
  type: remake
  updated: 2023-06-11
  url: https://github.com/shinyquagsire23/OpenJKDF2
  images:
  - https://i.imgur.com/GH5Hgkx.png

- name: OpenKeeper
  development: active
  frameworks:
  - JMonkeyEngine
  langs:
  - Java
  licenses:
  - GPL3
  content: commercial
  originals:
  - Dungeon Keeper 2
  repo: https://github.com/tonihele/OpenKeeper
  status: unplayable
  type: remake
  updated: 2021-04-14
  video:
    youtube: 5CXqWdbWrVs

- name: OpenKKnD
  type: remake
  originals:
  - Krush, Kill 'n' Destroy
  repo: https://github.com/gp-alex/OpenKKND
  development: halted
  status: semi-playable
  langs:
  - C++ 
  licenses:
  - GPL3
  content: commercial
  info: Based on original executable decompilation
  updated: 2022-04-18

- name: OpenKrush
  type: remake
  originals:
  - Krush, Kill 'n' Destroy
  repo: https://github.com/IceReaper/OpenKrush
  feed: https://github.com/IceReaper/OpenKrush/releases.atom
  development: sporadic
  status: semi-playable
  langs:
  - C#
  licenses:
  - GPL3
  frameworks:
  - OpenRA
  content: commercial
  added: 2019-03-22
  updated: 2024-07-18
  url: https://www.kknd-game.com/about
  images:
  - https://media.moddb.com/images/mods/1/38/37924/OpenRA-2018-12-16T105029073Z.png
  video:
    youtube: 3UBOrp5YK6Q

- name: OpenLara
  langs:
  - C++
  licenses:
  - BSD2
  content: commercial
  frameworks:
  - WebGL
  originals:
  - Tomb Raider
  status: playable
  repo: https://github.com/XProger/OpenLara
  development: sporadic
  type: remake
  updated: 2022-10-15
  url: http://xproger.info/projects/OpenLara/
  video:
    youtube: 4DqJOv-wmuU
  images:
  - https://camo.githubusercontent.com/9aaeccfe8535e07bc05f4bdf7f15040d89889f18a927334254f1d3e1b8a0f748/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f776174657266616c6c2e6a7067
  - https://camo.githubusercontent.com/6d044e7ed1661fa3520e2482defea593e8ab2f5bbade6f34e4bd8a813ef7e4ed/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f6d756c74692d61696d2e6a7067
  - https://camo.githubusercontent.com/d644049ddd7b1b40f8cd28ecd067d793de741e93c999fe40b91690e0bd446dd1/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f63617573746963732e6a7067
  - https://camo.githubusercontent.com/064cf195462ac84fc5739d537a59a80f0504b4c8d31cc716e931574e5a29fe12/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f637574312e6a7067
  - https://camo.githubusercontent.com/3aee2ca44e5566cb48da92eac4aed6a9837c0f8d1fa4c45bc606aa127ffb0bf0/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f666c69706d61702e6a7067
  - https://camo.githubusercontent.com/9cf320cfb8c337863347721e59dff21ae1ee9673109dbe9cf54e415abe66f44c/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f7472325f6f706572612e6a7067
  - https://camo.githubusercontent.com/2dd895a53604d21df06a443a081c325bf4c4096d776c1dd87493c380a997cf4a/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f7472325f756e7761746572312e6a7067
  - https://camo.githubusercontent.com/02d0d53ccbe0f885e73482b49b962c1c3cb741aa6d5701f02d683c9945aaaaad/687474703a2f2f7870726f6765722e696e666f2f70726f6a656374732f4f70656e4c6172612f73686f74732f7472335f74656d706c652e6a7067

- name: OpenLGR
  originals:
  - Lego Racers
  type: remake
  repo: 'https://github.com/james-knippes/openlgr'
  development: halted
  status: unplayable
  content: commercial
  langs:
  - C
  frameworks:
  - SDL2
  - OpenGL
  licenses:
  - GPL2
  info: A experimental source port based on OpenSWE1R.
  updated: 2021-12-24
  images:
  - >-
    https://camo.githubusercontent.com/c7965f14a7a7559126c3b54d99a1ac22a2569dfc3ccab42f6050b7fd7a1e8272/68747470733a2f2f6b72756c2e66696e662e756e692d68616e6e6f7665722e64652f7e6a616e6b6e697474656c2f696d616765732f696e67616d655f687970652e706e67

- name: OpenLiero
  feed: https://twitter.com/lieroofficial
  langs:
  - C++
  licenses:
  - Custom
  content: free
  development: halted
  status: playable
  multiplayer:
  - Split-screen
  frameworks:
  - SDL
  originals:
  - Liero
  repo: https://github.com/gliptic/liero
  type: official
  url: https://www.liero.be
  updated: 2019-04-09
  info: Perfect clone of 1.33; a.k.a. Liero 1.36
  images:
  - https://happypenguin.altervista.org/screenshots/openliero.png
  video:
    youtube: BzvWW_SzZvk

- name: OpenLieroX
  images:
  - https://www.openlierox.net/official/screenshots/olx2.png
  - https://www.openlierox.net/official/screenshots/olx4.png
  - https://www.openlierox.net/official/screenshots/olx11.png
  - https://www.openlierox.net/official/screenshots/olx6.png
  langs:
  - C++
  frameworks:
  - SDL
  - SDL2
  licenses:
  - LGPL2
  development: halted
  originals:
  - Liero
  status: playable
  multiplayer:
  - Online
  - Competitive
  - LAN
  repo: https://github.com/albertz/openlierox
  type: remake
  added: 2011-06-03
  updated: 2024-07-19
  url: https://www.openlierox.net/

- name: OpenLoco
  type: remake
  originals:
  - Chris Sawyer's Locomotion
  repo: https://github.com/OpenLoco/OpenLoco
  feed: https://openloco.io/feed.xml
  development: very active
  url: https://openloco.io
  status: playable
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - MIT
  content: commercial
  info: The original game use the modified version of RollerCoaster Tycoon 2's engine. OpenLoco using modified version of
    OpenRCT2's engine.
  added: 2019-03-19
  updated: 2024-07-20
  images:
  - https://openloco.io/assets/img/gallery-screenshot-0.png
  - https://openloco.io/assets/img/gallery-screenshot-1.png
  - https://openloco.io/assets/img/gallery-screenshot-2.png
  - https://openloco.io/assets/img/gallery-screenshot-3.png
  - https://openloco.io/assets/img/gallery-screenshot-4.png
  - https://openloco.io/assets/img/gallery-screenshot-5.png
  - https://openloco.io/assets/img/gallery-screenshot-6.png
  - https://openloco.io/assets/img/gallery-screenshot-7.png
  - https://openloco.io/assets/img/gallery-screenshot-8.png

- name: OpenMB
  originals:
  - Mount & Blade
  type: remake
  url: https://www.moddb.com/games/openmb
  repo: https://github.com/cookgreen/OpenMB
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - C#
  frameworks:
  - OGRE
  licenses:
  - GPL3
  info: Open Source role-playing game engine for Taleworlds' Mount&Blade Series written in C# using Ogre3d Engine
  added: 2019-09-13
  updated: 2024-07-22
  images:
  - https://media.moddb.com/images/games/1/72/71205/image.png
  - https://media.moddb.com/images/games/1/72/71205/inventory.1.png
  - https://media.moddb.com/images/games/1/72/71205/game-notes-faction.PNG

- name: OpenMBU
  originals:
  - Marble Blast Ultra
  type: remake
  repo: 'https://github.com/MBU-Team/OpenMBU'
  feed: 'https://github.com/MBU-Team/OpenMBU/releases.atom'
  development: sporadic
  status: playable
  content: free
  langs:
  - C++
  frameworks:
  - Torque Shader
  - DirectX
  licenses:
  - Custom
  added: 2025-11-21
  updated: 2025-11-21

- name: OpenMC2
  development: halted
  langs:
  - C++
  licenses:
  - GPL3
  multiplayer:
  - LAN
  content: commercial
  originals:
  - Midnight Club II
  repo: https://github.com/OpenMC2/OpenMC2
  status: playable
  type: remake
  updated: 2022-04-18

- name: OpenMoHAA
  frameworks:
  - SDL2
  images:
  - https://openmohaa.sourceforge.net/media/hud.jpg
  - https://github.com/openmoh/openmohaa/blob/main/docs/images/opm_53_tt_1.png
  - https://github.com/openmoh/openmohaa/blob/main/docs/images/opm_50b_1.png
  - https://github.com/openmoh/openmohaa/blob/main/docs/images/opm_50b_2.png
  - https://github.com/openmoh/openmohaa/blob/main/docs/images/opm-arm_53_tt_1.png
  info: based on ioquake3
  langs:
  - C
  - C++
  licenses:
  - GPL2
  content: commercial
  development: very active
  originals:
  - 'Medal of Honor: Allied Assault'
  repo: https://github.com/openmoh/openmohaa
  status: unplayable
  type: remake
  updated: 2023-06-12
  url: https://openmohaa.sourceforge.net/

- name: OpenMoM
  type: clone
  originals:
  - Master of Magic
  repo: https://github.com/Jakz/openmom
  development: halted
  status: semi-playable
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  content: commercial
  added: 2019-04-02
  updated: 2024-07-23
  images:
  - https://raw.githubusercontent.com/Jakz/openmom/master/docs/screenshots/screenshot-main.png
  - https://raw.githubusercontent.com/Jakz/openmom/master/docs/screenshots/screenshot-city.png
  - https://raw.githubusercontent.com/Jakz/openmom/master/docs/screenshots/screenshot-combat.png

- name: OpenMOO2
  images:
  - https://www.pygame.org/thumb/01974f1641f002c1433af3fa02d550dd.jpg
  langs:
  - Python
  licenses:
  - GPL2
  development: halted
  originals:
  - Master of Orion 2
  status: unplayable
  repo: https://github.com/mimi1vx/openmoo2
  type: remake
  updated: 2022-03-23

- name: OpenMoonstone
  originals:
  - 'Moonstone: A Hard Days Knight'
  type: remake
  repo: 'https://github.com/joetsoi/OpenMoonstone'
  development: halted
  content: commercial
  status: unplayable
  langs:
  - Rust
  - Python
  frameworks:
  - SDL2
  licenses:
  - AGPL3
  added: '2025-01-08'
  updated: '2025-01-08'
  images:
  - https://raw.githubusercontent.com/wiki/joetsoi/OpenMoonstone/screenshots/practice.png
  - https://raw.githubusercontent.com/wiki/joetsoi/OpenMoonstone/screenshots/four_player.png
  - https://raw.githubusercontent.com/wiki/joetsoi/OpenMoonstone/screenshots/map.png
  video:
    youtube: Jakht4PBzFE

- name: OpenMortal
  images:
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17056.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17060.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17064.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17066.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17070.jpg/max/max/1
  - https://a.fsdn.com/con/app/proj/openmortal/screenshots/17068.jpg/max/max/1
  langs:
  - C++
  - Perl
  frameworks:
  - SDL
  licenses:
  - GPL2
  content: open
  development: halted
  originals:
  - Mortal Kombat
  status: playable
  repo: https://sourceforge.net/projects/openmortal/
  type: clone
  added: 2015-04-03
  updated: 2025-05-09
  url: https://openmortal.sourceforge.net

- name: OpenMW
  images:
  - https://wiki.openmw.org/images/0.40_Screenshot-Balmora_1.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Balmora_3.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Bitter_Coast_1.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Foyada_Mamaea.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Halfway_Tavern.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Nevrasa_Dralor.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Panat.png
  - https://wiki.openmw.org/images/0.40_Screenshot-Seyda_Neen_1.png
  langs:
  - C++
  frameworks:
  - OpenSceneGraph
  - SDL2
  licenses:
  - GPL3
  development: very active
  originals:
  - 'The Elder Scrolls III: Morrowind'
  repo: https://gitlab.com/OpenMW/openmw
  status: playable
  type: remake
  url: https://openmw.org/en/
  updated: 2021-04-21
  video:
    youtube: UeJc3e_qQWY

- name: OpenMW for Android
  type: remake
  originals:
  - 'The Elder Scrolls III: Morrowind'
  repo: https://github.com/xyzz/openmw-android
  url: https://omw.xyz.is/
  development: halted
  status: playable
  langs:
  - Kotlin
  frameworks:
  - SDL
  licenses:
  - GPL3
  content: commercial
  added: 2019-09-20
  updated: 2024-07-24
  video:
    youtube: E5VuN3d1fOM

- name: OpenNefia
  langs:
  - C#
  - Lua
  licenses:
  - MIT
  development: sporadic
  originals:
  - 'Elona'
  repo: https://github.com/OpenNefia/OpenNefia
  status: unplayable
  type: remake
  updated: 2024-03-28
  content: commercial
  frameworks:
  - "L\xD6VE"
  - .NET

- name: OpenNFS
  type: remake
  originals:
  - 'Need For Speed III: Hot Pursuit'
  repo: https://github.com/OpenNFS/OpenNFS
  development: halted
  status: unplayable
  langs:
  - C++
  frameworks:
  - OpenGL
  - Bullet3
  licenses:
  - MIT
  content: commercial
  added: 2019-05-10
  updated: 2024-07-25
  images:
  - https://raw.githubusercontent.com/OpenNFS/OpenNFS/main/doc/BuildProgress.png

- name: OpenNFS1
  images:
  - https://1amstudios.com/img/opennfs1/viper-vertigoridge.jpg
  - https://1amstudios.com/img/opennfs1/rx7-alpine.jpg
  - https://1amstudios.com/img/opennfs1/supra-city.jpg
  - https://1amstudios.com/img/opennfs1/vette-transtropolis.jpg
  - https://1amstudios.com/img/opennfs1/image2.jpg
  - https://1amstudios.com/img/opennfs1/image16.jpg
  - https://1amstudios.com/img/opennfs1/image13.jpg
  - https://1amstudios.com/img/opennfs1/image12.jpg
  - https://1amstudios.com/img/opennfs1/image10.jpg
  langs:
  - C#
  frameworks:
  - MonoGame
  licenses:
  - As-is
  content: commercial
  development: halted
  originals:
  - The Need for Speed
  status: semi-playable
  repo: https://github.com/jeff-1amstudios/OpenNFS1
  type: remake
  updated: 2022-04-08
  url: http://1amstudios.com/projects/opennfs1/
  video:
    youtube: Xfv_UrDq-As

- name: OpenNitemare3D
  originals:
  - Nitemare 3D
  type: remake
  repo: https://github.com/BBQGiraffe/OpenNitemare3D
  development: halted
  status: semi-playable
  content: commercial
  langs:
  - C#
  - C
  frameworks:
  - SDL2
  licenses:
  - GPL3
  info: currently being rewritten in C
  added: 2021-12-09
  updated: 2024-07-26
  video:
    youtube: KLNquQF4iJo

- name: OpenNotrium
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - Custom
  - GPL3
  development: halted
  originals:
  - Notrium
  repo: https://github.com/verhoevenv/OpenNotrium
  status: playable
  type: remake
  added: 2019-05-29
  updated: 2024-07-27
  images:
  - https://repo.openpandora.org/files/pnd/opennotrium_ptitseb/preview1.png
  - https://repo.openpandora.org/files/pnd/opennotrium_ptitseb/preview2.png
  - https://repo.openpandora.org/files/pnd/opennotrium_ptitseb/preview3.png

- name: OpenNox
  originals:
  - Nox
  type: remake
  repo: https://github.com/noxworld-dev/opennox
  url: https://www.patreon.com/opennox
  development: active
  status: playable
  multiplayer:
  - Online
  - LAN
  content: commercial
  langs:
  - Go
  licenses:
  - GPL3
  updated: 2022-04-11
  video:
    youtube: K7yqrxeZQVA

- name: OpenOMF
  development: active
  info: single player, 2 player and network play work, content from omf2097.com
  langs:
  - C
  licenses:
  - MIT
  content: free
  originals:
  - 'One Must Fall: 2097'
  repo: https://github.com/omf2097/openomf
  status: playable
  type: remake
  updated: 2014-08-16
  url: https://www.openomf.org
  video:
    youtube: RYiUsDSApM8

- name: OpenOP2
  originals:
  - Outpost 2
  type: remake
  repo: 'https://github.com/OpenOP2/OpenOP2'
  feed: 'https://github.com/OpenOP2/OpenOP2/releases.atom'
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - OpenRA
  licenses:
  - GPL3
  added: 2025-07-28
  updated: 2025-07-28

- name: OpenOutcast
  images:
  - https://a.fsdn.com/con/app/proj/ocmod/screenshots/75332.jpg
  langs:
  - C++
  licenses:
  - GPL2
  development: halted
  originals:
  - Outcast
  status: unplayable
  repo: https://sourceforge.net/projects/ocmod/
  type: remake
  updated: 2021-09-06

- name: OpenPop
  images:
  - https://a.fsdn.com/con/app/proj/openpopulous/screenshots/236454.jpg
  langs:
  - C++
  frameworks:
  - SDL
  licenses:
  - GPL3
  development: halted
  originals:
  - 'Populous: The Beginning'
  status: unplayable
  repo: https://sourceforge.net/projects/openpopulous/
  type: remake
  updated: 2022-02-19
  url: https://openpopulous.sourceforge.net
  info: only supports 2D view

- name: OpenRA
  images:
  - https://www.openra.net/images/news/20150531-ra-editor.png
  - https://www.openra.net/images/news/20140405-beacons.png
  - https://www.openra.net/images/news/20150808-d2k-range-circles.png
  langs:
  - C#
  - Lua
  frameworks:
  - .NET
  - SDL2
  - OpenAL
  - OpenGL
  licenses:
  - GPL3
  multiplayer:
  - Online
  - LAN
  development: very active
  status: playable
  originals:
  - Command & Conquer
  - 'Command & Conquer: Red Alert'
  - Dune 2000
  content: free
  repo: https://github.com/OpenRA/OpenRA
  type: remake
  url: https://www.openra.net
  feed: https://www.openra.net/news/atom
  video:
    youtube: CAK-SwSZjbY
  added: 2011-06-02
  updated: 2021-10-03

- name: OpenRaider
  langs:
  - C++
  licenses:
  - GPL2
  content: commercial
  development: halted
  frameworks:
  - OpenGL
  - OpenAL
  originals:
  - Tomb Raider
  status: playable
  type: remake
  updated: 2020-09-30
  repo: https://github.com/xythobuz/OpenRaider
  images:
  - https://cloud.githubusercontent.com/assets/557828/6645515/930b05d0-c9bd-11e4-9b33-194b6d9d6288.png
  - https://cloud.githubusercontent.com/assets/557828/3715061/737aca16-15cc-11e4-99b5-1db98fae5257.png
  - https://camo.githubusercontent.com/695008dc13bb545cf02f7be09413039084e1f25b/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f3535373832382f323430393232362f39303031666633342d616161612d313165332d393739302d3032643165306238326234362e706e67

- name: OpenRCT2
  images:
  - https://i.imgur.com/fpoZdze.png
  langs:
  - C++
  frameworks:
  - SDL2
  - OpenGL
  licenses:
  - GPL3
  content: commercial
  development: very active
  originals:
  - RollerCoaster Tycoon
  - RollerCoaster Tycoon 2
  repo: https://github.com/OpenRCT2/OpenRCT2
  feed: https://github.com/OpenRCT2/OpenRCT2/releases.atom
  status: playable
  type: remake
  added: 2014-08-20
  updated: 2024-07-31
  url: https://openrct2.io/

- name: OpenRedAlert
  originals:
  - 'Command & Conquer: Red Alert'
  type: remake
  url: https://sourceforge.net/projects/openredalert
  repo: https://github.com/damiencarol/openredalert
  feed: 'https://sourceforge.net/projects/openredalert/rss?path=/'
  development: halted
  status: semi-playable
  content: commercial
  langs:
  - C++
  frameworks:
  - SDL
  licenses:
  - GPL2
  added: 2025-07-25
  updated: 2025-07-25
  images:
  - 'https://a.fsdn.com/con/app/proj/openredalert/screenshots/185362.jpg'
  - 'https://a.fsdn.com/con/app/proj/openredalert/screenshots/174529.jpg'
  - 'https://a.fsdn.com/con/app/proj/openredalert/screenshots/185354.jpg'
  - 'https://a.fsdn.com/con/app/proj/openredalert/screenshots/185360.jpg'

- name: OpenRoads
  frameworks:
  - WebGL
  langs:
  - TypeScript
  licenses:
  - MIT
  development: halted
  originals:
  - SkyRoads
  repo: https://github.com/anprogrammer/OpenRoads
  status: playable
  type: remake
  updated: 2015-07-02
  url: http://openroadsgame.com/

- name: OpenRW "Open ReWrite"
  frameworks:
  - SDL2
  - OpenGL
  langs:
  - C++
  licenses:
  - GPL3
  content: commercial
  development: halted
  originals:
  - Grand Theft Auto III
  repo: https://github.com/rwengine/openrw
  status: semi-playable
  type: remake
  added: 2016-05-18
  updated: 2024-08-01
  url: https://openrw.org
  images:
  - https://openrw.org/media/gallery/1.jpg
  - https://openrw.org/media/gallery/2.jpg
  - https://openrw.org/media/gallery/3.jpg
  - https://openrw.org/media/gallery/4.jpg

- name: OpenSA
  images:
  - https://media.moddb.com/images/mods/1/42/41459/OpenRA-2020-05-31T094932231Z.png
  - https://media.moddb.com/images/mods/1/42/41459/OpenRA-2020-05-31T092422509Z.png
  - https://media.moddb.com/images/mods/1/42/41459/OpenRA-2020-05-31T085110339Z.png
  langs:
  - C#
  - Lua
  frameworks:
  - OpenRA
  licenses:
  - GPL3
  content: commercial
  originals:
  - Swarm Assault
  repo: https://github.com/Dzierzan/OpenSA
  multiplayer:
  - Online
  - LAN
  development: complete
  status: playable
  type: remake
  added: 2021-01-07
  updated: 2024-08-02
  url: https://www.moddb.com/mods/opensa/

- name: OpenSAGE
  images:
  - https://opensage.github.io/static/2a7caced5abe9863c97676a6314b01a5/70bed/main-menu.jpg
  - https://opensage.github.io/static/add231520a965b3f2c11c9f69005bc27/5c63f/viewer-2.png
  - https://opensage.github.io/static/0459d41e5abc70d874254a93d80b71ec/5c63f/in-game-1.png
  - https://opensage.github.io/static/14e48d0593bb9c5a07e3396b9cf3b3cf/5c63f/viewer-3.png
  langs:
  - C#
  frameworks:
  - .NET
  licenses:
  - LGPL3
  development: active
  originals:
  - 'Command & Conquer: Generals'
  status: unplayable
  repo: https://github.com/OpenSAGE/OpenSAGE
  type: remake
  updated: 2019-11-20
  url: https://opensage.github.io/

- name: OpenSC2K
  development: halted
  langs:
  - JavaScript
  type: remake
  status: unplayable
  frameworks:
  - Phaser
  - WebGL
  licenses:
  - GPL3
  content: commercial
  repo: https://github.com/nicholas-ochoa/OpenSC2K
  added: 2019-01-30
  updated: 2024-08-05
  images:
  - https://raw.githubusercontent.com/rage8885/OpenSC2K/master/screenshots/1.png
  - https://raw.githubusercontent.com/rage8885/OpenSC2K/master/screenshots/2.png
  - https://raw.githubusercontent.com/rage8885/OpenSC2K/master/screenshots/3.png
  originals:
  - SimCity 2000

- name: OpenSkyscraper
  images:
  - https://raw.githubusercontent.com/wiki/fabianschuiki/OpenSkyscraper/current.png
  langs:
  - C++
  licenses:
  - GPL2
  content: commercial
  development: halted
  frameworks:
  - SFML
  originals:
  - SimTower
  repo: https://github.com/fabianschuiki/OpenSkyscraper
  status: playable
  type: remake
  added: 2014-01-05
  updated: 2024-08-06
  url: https://openskyscraper.org

- name: OpenSoldat
  originals:
  - Soldat
  type: remake
  repo: 'https://github.com/opensoldat/opensoldat'
  url: >-
    https://steamcommunity.com/games/638490/announcements/detail/2192636057421436703
  feed: 'https://github.com/opensoldat/opensoldat/releases.atom'
  development: active
  status: playable
  multiplayer:
  - Online
  - LAN
  content: free
  langs:
  - Pascal
  - C++
  frameworks:
  - SDL
  - OpenAL
  licenses:
  - MIT
  added: 2026-01-20
  updated: 2026-01-20
  video:
    youtube: FpWuOOs0TMg

- name: OpenSpades
  langs:
  - C++
  frameworks:
  - SDL2
  - OpenGL
  licenses:
  - GPL3
  development: sporadic
  status: playable
  info: OpenSpades is a compatible client of Ace of Spades 0.75.
  multiplayer:
  - Online
  - Competitive
  originals:
  - Ace of Spades
  repo: https://github.com/yvt/openspades
  type: remake
  added: 2015-04-10
  updated: 2024-08-07
  url: https://openspades.yvt.jp
  images:
  - https://openspades.yvt.jp/media/images/ss1.jpg
  - https://openspades.yvt.jp/media/images/ss2.jpg
  - https://openspades.yvt.jp/media/images/ss3.jpg
  - https://openspades.yvt.jp/media/images/ss4.jpg
  - https://openspades.yvt.jp/media/images/ss5.jpg
  - https://openspades.yvt.jp/media/images/ss6.jpg

- name: OpenSolomonsKey
  originals:
  - Solomon's Key
  type: clone
  repo: 'https://github.com/mdodis/OpenSolomonsKey'
  development: halted
  status: playable
  content: commercial
  langs:
  - C++
  frameworks:
  - OpenGL
  - SDL2
  licenses:
  - Unlicense
  added: '2020-07-24'
  updated: 2024-08-08
  images:
  - https://github.com/mdodis/OpenSolomonsKey/blob/master/page/banner.png?raw=true

- name: OpenSR
  frameworks:
  - Qt
  langs:
  - C++
  licenses:
  - GPL3
  content: commercial
  development: halted
  originals:
  - 'Space Rangers 2: Dominators'
  status: semi-playable
  repo: https://github.com/ObKo/OpenSR
  type: remake
  updated: 2021-11-19

- name: openStrato
  frameworks:
  - WebGL
  langs:
  - JavaScript
  licenses:
  - GPL2
  development: halted
  originals:
  - 'Stratosphere: Conquest of the Skies'
  status: unplayable
  repo: https://github.com/gerdl/openStrato
  type: remake
  added: 2015-06-18
  updated: 2015-06-18

- name: openstrike
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - GPL3
  content: commercial
  development: halted
  originals:
  - 'DesertStrike: Return to the Gulf'
  repo: https://github.com/AMDmi3/openstrike
  status: unplayable
  type: remake
  added: 2015-04-04
  updated: 2024-08-09

- name: OpenSupaplex
  langs:
  - C
  frameworks:
  - SDL2
  licenses:
  - GPL3
  content: free
  development: halted
  originals:
  - Supaplex
  repo: https://github.com/sergiou87/open-supaplex
  status: playable
  type: remake
  added: 2020-05-06
  updated: 2024-08-12
  images:
  - https://i.imgur.com/6FUB9tO.png
  - https://i.imgur.com/5OK0Yld.png
  - https://i.imgur.com/YaZqcgo.png
  - https://i.imgur.com/xbapXyt.png
  - https://i.imgur.com/l3dI1Sw.png
  - https://i.imgur.com/YGxbclW.png

- name: OpenSWE1R
  type: remake
  originals:
  - 'Star Wars Episode I: Racer'
  repo: https://github.com/OpenSWE1R/openswe1r
  development: halted
  status: semi-playable
  langs:
  - C
  frameworks:
  - OpenGL
  - DirectX
  - SDL2
  licenses:
  - GPL2
  content: commercial
  added: 2019-03-16
  updated: 2024-08-13
  images:
  - https://i.imgur.com/LAqHPgh.png

- name: OpenTESArena
  development: active
  frameworks:
  - SDL2
  langs:
  - C++
  licenses:
  - MIT
  content: commercial
  originals:
  - 'The Elder Scrolls: Arena'
  repo: https://github.com/afritz1/OpenTESArena
  status: unplayable
  type: remake
  updated: 2016-10-09

- name: OpenTitus
  frameworks:
  - SDL
  images:
  - https://repo.openpandora.org/files/pnd/package.id.here/preview/titus-the-fox3.png
  langs:
  - C
  licenses:
  - GPL3
  content: commercial
  development: halted
  originals:
  - Titus the Fox
  status: playable
  repo: https://github.com/stople/OpenTitus
  type: remake
  updated: 2021-08-03
  url: https://opentitus.sourceforge.net

- name: OpenTomb
  images:
  - https://opentomb.github.io/img/media/01.jpg
  - https://opentomb.github.io/img/media/02.jpg
  - https://opentomb.github.io/img/media/03.jpg
  langs:
  - C++
  frameworks:
  - OpenGL
  - SDL2
  - Bullet3
  licenses:
  - LGPL3
  content: commercial
  development: halted
  originals:
  - Tomb Raider
  status: playable
  repo: https://github.com/opentomb/OpenTomb
  type: remake
  added: 2014-04-29
  updated: 2024-08-14
  url: https://opentomb.github.io/
  video:
    youtube: ouGs29woi0k
  info: re-implementation of the classic Tomb Raider engine, with contemporary updates, features and additions

- name: OpenTPW
  originals:
  - Theme Park World
  type: remake
  repo: 'https://github.com/ThemeParkWorld/OpenTPW'
  development: sporadic
  status: unplayable
  content: commercial
  langs:
  - 'C#'
  frameworks:
  - .NET
  licenses:
  - MIT
  updated: '2023-04-25'
  images:
  - 'https://blog.gu3.me/2022/opentpw.png'

- name: OpenTriad
  langs:
  - Java
  licenses:
  - GPL3
  development: halted
  originals:
  - Triple Triad
  status: playable
  type: remake
  updated: 2022-05-26
  url: https://github.com/benjaminfoo/OpenTriad
  images:
  - https://raw.githubusercontent.com/benjaminfoo/OpenTriad/develop/docs/ingame_term.png

- name: OpenTTD
  development: very active
  images:
  - https://media.openttd.org/images/screens/1.4/02-opengfx-1920x1200.png
  - https://media.openttd.org/images/screens/1.3/realgrowth.png
  langs:
  - C++
  frameworks:
  - OpenGL
  - SDL2
  licenses:
  - GPL2
  content: swappable
  originals:
  - Transport Tycoon
  repo: https://github.com/OpenTTD/OpenTTD
  feed: https://github.com/OpenTTD/OpenTTD/releases.atom
  status: playable
  type: remake
  added: 2011-06-01
  updated: 2024-08-15
  url: https://www.openttd.org

- name: OpenTyrian
  langs:
  - C
  frameworks:
  - SDL2
  licenses:
  - GPL2
  content: free
  development: sporadic
  originals:
  - Tyrian
  status: playable
  repo: https://github.com/opentyrian/opentyrian
  images:
  - https://github.com/opentyrian/opentyrian/wiki/opentyrian_torm.png
  type: remake
  updated: 2021-10-11
  video:
    youtube: gsjX-duCyiQ

- name: OpenTyrian2000
  originals:
  - Tyrian
  type: remake
  url: 'https://github.com/KScl/opentyrian2000'
  feed: https://github.com/KScl/opentyrian2000/releases.atom
  development: sporadic
  status: playable
  multiplayer:
  - Online
  - LAN
  content: open
  langs:
  - C
  licenses:
  - GPL2
  info: Port of OpenTyrian made to support Tyrian2000
  updated: 2022-05-31

- name: OpenVIII
  type: remake
  originals:
  - Final Fantasy VIII
  repo: https://github.com/MaKiPL/OpenVIII-monogame
  url: https://makipl.github.io/OpenVIII-monogame/
  development: halted
  status: unplayable
  langs:
  - C#
  frameworks:
  - MonoGame
  licenses:
  - MIT
  content: commercial
  added: 2019-09-17
  updated: 2024-08-16
  images:
  - https://i.postimg.cc/2SJRND9j/Screenshot-from-2019-06-11-11-46-24.png
  - https://i.postimg.cc/5NsWpvwC/Screenshot-from-2019-06-11-11-44-38.png
  - https://i.postimg.cc/rwzXHmJY/Screenshot-from-2019-06-11-11-44-19.png
  - https://i.postimg.cc/RVSzcGnm/Screenshot-from-2019-06-11-11-45-14.png

- name: OpenVice
  originals:
  - 'Grand Theft Auto: Vice City'
  type: remake
  repo: 'https://github.com/clashbyte/openvice'
  development: halted
  status: unplayable
  content: commercial
  langs:
  - C#
  frameworks:
  - OpenTK
  licenses:
  - GPL3
  added: 2021-12-03
  updated: 2024-08-19
  video:
    youtube: R3Jxgm1xDYY

- name: OpenWar
  development: halted
  images:
  - https://raw.githubusercontent.com/andreas-jonsson/openwar/master/doc/screenshot2.png
  - https://raw.githubusercontent.com/andreas-jonsson/openwar/master/doc/screenshot3.gif
  - https://raw.githubusercontent.com/andreas-jonsson/openwar/master/doc/screenshot4.png
  langs:
  - Go
  licenses:
  - GPL3
  content: commercial
  originals:
  - 'Warcraft: Orcs & Humans'
  repo: https://github.com/andreas-jonsson/openwar
  status: unplayable
  type: remake
  added: 2016-08-09
  updated: 2024-08-20

- name: OpenXcom
  images:
  - https://web.archive.org/web/20211231021730if_/https://openxcom.org/wp-content/gallery/v1-0/00_mainmenu.png
  - https://web.archive.org/web/20211231023450if_/https://openxcom.org/wp-content/gallery/v1-0/01_globe.png
  - https://web.archive.org/web/20211231021349if_/https://openxcom.org/wp-content/gallery/v1-0/04_inventory.png
  - https://web.archive.org/web/20211231024034if_/https://openxcom.org/wp-content/gallery/v1-0/07_pathpreview.png
  info: EU and TftD fully playable, feature complete, now development focus on bug fix
  langs:
  - C++
  licenses:
  - GPL3
  content: commercial
  development: active
  originals:
  - 'X-COM: UFO Defense'
  - 'X-COM: Terror from the Deep'
  repo: https://github.com/OpenXcom/OpenXcom
  status: playable
  type: remake
  url: https://openxcom.org/
  video:
    youtube: oxlRQGnGaDo
  updated: 2022-05-03

- name: OpenXeen
  originals:
  - 'Might and Magic IV: Clouds of Xeen'
  - 'Might and Magic V: Darkside of Xeen'
  type: remake
  repo: 'https://github.com/busyDuckman/OpenXeen'
  feed: 'https://github.com/busyDuckman/OpenXeen/releases.atom'
  development: halted
  status: unplayable
  content: commercial
  langs:
  - Java
  licenses:
  - GPL2
  added: 2025-07-17
  updated: 2025-07-17
  images:
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen2.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen5.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen6.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen7.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen11.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen13.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen14.png?raw=true
  - >-
    https://github.com/busyDuckman/OpenXeen/blob/master/doco/dev_history/openXeen16.png?raw=true

- name: OpenXRay
  originals:
  - S.T.A.L.K.E.R.
  type: remake
  repo: 'https://github.com/OpenXRay/xray-16'
  development: very active
  status: playable
  multiplayer:
  - Online
  - LAN
  content: commercial
  langs:
  - C++
  - Lua
  frameworks:
  - SDL2
  - DirectX
  - OpenGL
  - Open Dynamics Engine
  licenses:
  - Custom
  info: 'Improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World.'
  images:
  - 'https://user-images.githubusercontent.com/6609131/91668987-782c7a00-eb3b-11ea-931a-22bb34c61125.png'
  - 'https://user-images.githubusercontent.com/6609131/93977326-82d9d800-fda4-11ea-921a-5b7377416144.png'
  - 'https://user-images.githubusercontent.com/6609131/93976903-dd266900-fda3-11ea-9e33-9416ce43bbad.png'
  video:
    youtube: Alr9YQv2JWQ
  updated: 2020-09-21

- name: OpenYandere
  originals:
  - Yandere Simulator
  type: clone
  repo: 'https://github.com/Evilpersonwithnosoul/OpenYandere'
  development: halted
  status: semi-playable
  content: free
  langs:
  - 'C#'
  frameworks:
  - Unity
  licenses:
  - GPL3
  updated: '2020-07-24'

- name: 'The Operative: No One Lives Forever'
  originals:
  - 'The Operative: No One Lives Forever'
  type: official
  repo: 'https://github.com/osgcc/no-one-lives-forever'
  url: >-
    https://web.archive.org/web/20020217233624/http://pc.ign.com/articles/095/095995p1.html
  development: complete
  status: playable
  multiplayer:
  - Online
  - LAN
  content: commercial
  langs:
  - C++
  frameworks:
  - LithTech
  - DirectX
  licenses:
  - As-is
  added: 2026-01-20
  updated: 2026-01-20

- name: OpMon
  frameworks:
  - Godot
  langs:
  - GDScript
  licenses:
  - GPL3
  development: sporadic
  originals:
  - Pokémon
  status: semi-playable
  repo: https://github.com/OpMonTeam/OpMon
  type: remake
  updated: 2022-10-15
  url: https://opmon-game.ga
  images:
  - https://opmon-game.ga/img/screenshot_2.png

- name: opsu!
  originals:
  - Osu! Tatakae! Ouendan
  type: clone
  repo: 'https://github.com/itdelatrisu/opsu'
  url: 'https://itdelatrisu.github.io/opsu/'
  development: halted
  status: playable
  content: free
  langs:
  - Java
  frameworks:
  - Slick2D
  - OpenGL
  licenses:
  - GPL3
  info: Unofficial osu! client
  updated: '2020-07-24'
  images:
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s01.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s02.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s03.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s04.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s05.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s06.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s07.png'
  - 'https://itdelatrisu.github.io/opsu/images/screenshots/s08.png'

- name: Orbit-Hopper
  images:
  - https://libregamewiki.org/images/3/38/Orbit-Hopper_-_m1.png
  langs:
  - C++
  frameworks:
  - SDL
  - OpenGL
  licenses:
  - GPL2
  development: halted
  originals:
  - SkyRoads
  status: playable
  type: clone
  updated: 2020-08-25
  url: http://www.zneaker.com/projects.html#orbit

- name: Orbium
  langs:
  - JavaScript
  licenses:
  - GPL2
  content: free
  development: halted
  originals:
  - Log!cal
  repo: https://github.com/bni/orbium
  status: playable
  type: remake
  added: 2014-08-20
  updated: 2024-08-21
  url: https://bni.github.io/orbium/

- name: Ordoor
  type: remake
  originals:
  - 'Warhammer 40,000: Chaos Gate'
  repo: https://code.ur.gs/lupine/ordoor
  development: halted
  status: unplayable
  langs:
  - Go
  frameworks:
  - Ebitengine
  licenses:
  - MIT
  content: commercial
  added: 2018-12-31
  updated: 2024-08-23
  images:
  - https://ur.gs/img/ordoor-main-menu.gif

- name: OREGON 77
  type: clone
  originals:
  - The Oregon Trail
  url: https://cyber.dabamos.de/programming/fortran/oregon/
  development: complete
  status: playable
  langs:
  - Fortran
  licenses:
  - ISC
  updated: 2022-04-30

- name: orona
  licenses:
  - GPL2
  content: free
  development: halted
  langs:
  - CoffeeScript
  originals:
  - Bolo
  repo: https://github.com/stephank/orona
  status: semi-playable
  type: remake
  updated: 2022-11-29
  url: https://stephank.github.io/orona/bolo.html

- name: Ostrich Riders
  images:
  - https://a.fsdn.com/con/app/proj/ostrichriders/screenshots/229619.jpg
  - https://a.fsdn.com/con/app/proj/ostrichriders/screenshots/229617.jpg
  langs:
  - C++
  frameworks:
  - SFML
  licenses:
  - GPL3
  content: open
  development: halted
  originals:
  - Joust
  status: playable
  repo: https://github.com/dulsi/ostrichriders
  type: clone
  updated: 2022-07-17
  url: https://identicalsoftware.com/ostrichriders/

- name: osu!
  type: clone
  originals:
  - Osu! Tatakae! Ouendan
  - Taiko no Tatsujin
  - Beatmania IIDX
  repo: https://github.com/ppy/osu
  url: https://osu.ppy.sh/
  development: very active
  status: playable
  langs:
  - C#
  frameworks:
  - .NET
  licenses:
  - MIT
  content: free
  added: 2019-09-17
  updated: 2024-08-26
  images:
  - https://1.bp.blogspot.com/-QBBpM-Ypigg/VPMlUshslUI/AAAAAAAAA3w/OutunwDoSUM/s1600/lol.jpg

- name: Otto Matic
  originals:
  - Otto Matic
  type: remake
  repo: 'https://github.com/jorio/OttoMatic'
  feed: 'https://github.com/jorio/OttoMatic/releases.atom'
  development: sporadic
  status: playable
  content: free
  langs:
  - C
  frameworks:
  - SDL3
  licenses:
  - CC-BY-NC-SA
  added: 2025-11-28
  updated: 2025-11-28
  images:
  - 'https://raw.githubusercontent.com/jorio/OttoMatic/master/docs/screenshot.webp'

- name: Outlaw Disassembly
  originals:
  - Outlaw
  type: remake
  repo: 'https://www.qotile.net/minidig/disassembly/outlaw.asm'
  url: 'https://www.biglist.com/lists/stella/archives/200110/msg00146.html'
  development: complete
  status: playable
  langs:
  - Assembly
  licenses:
  - As-is
  added: 2025-11-05
  updated: 2025-11-05

- name: Outpost HD
  type: remake
  originals:
  - Outpost
  repo: https://github.com/OutpostUniverse/OPHD
  feed: https://github.com/OutpostUniverse/OPHD/releases.atom
  url: https://forum.outpost2.net/index.php/topic,5718.0.html
  langs:
  - C++
  frameworks:
  - SDL2
  development: active
  status: playable
  licenses:
  - BSD
  content: commercial
  added: 2019-05-04
  updated: 2024-08-27
  images:
  - https://i.ibb.co/QpTprw1/image.png
  - https://i.ibb.co/Nm7Chnh/image.png
  - https://i.ibb.co/NLRqjHc/image.png
  - https://i.ibb.co/z8JTQNs/image.png
  - https://i.ibb.co/k56WjLc/image.png
  - https://i.ibb.co/vV6k747/image.png
  video:
    youtube: Ofl2NVpZO_Y

- name: OutRun CPC
  frameworks:
  - QB64
  langs:
  - BASIC
  licenses:
  - As-is
  development: halted
  originals:
  - Out Run
  status: semi-playable
  type: remake
  updated: 2022-07-26
  url: http://outruncpc.free.fr/
  video:
    youtube: u44uLqybwOc

- name: Overgrowth
  type: official
  originals:
  - Overgrowth
  repo: https://github.com/WolfireGames/overgrowth
  url: https://overgrowth.wolfire.com
  development: complete
  status: playable
  multiplayer:
  - Split-screen
  - Co-op
  langs:
  - C
  - C++
  licenses:
  - Apache
  content: commercial
  updated: 2022-04-22
  images:
  - https://overgrowth.wolfire.com/static/b6e11749620b440479318d90b554e297/ec57e/overgrowth-screenshot-6.jpg
  - https://overgrowth.wolfire.com/static/ec09bf28c92f3261ccbc4d2a29019f38/ec57e/overgrowth-screenshot-3.jpg
  - https://overgrowth.wolfire.com/static/63e287c9ee481080d2acc452ab8ab724/ec57e/overgrowth-screenshot-7.jpg
  - https://overgrowth.wolfire.com/static/5ea80f43b95a07c3d9ee0ce166023832/ec57e/overgrowth-screenshot-1.jpg
  - https://overgrowth.wolfire.com/static/221a3fc98797337ccc18b4828e43988b/ec57e/overgrowth-screenshot-10.jpg
  video:
    youtube: o5l2xr5BBq8

- name: Ozymandias
  originals:
  - Pharaoh
  type: remake
  repo: 'https://github.com/dalerank/ozymandias'
  url: 'https://dalerank.itch.io/ozymandias'
  development: very active
  status: semi-playable
  multiplayer:
  - Competitive
  content: commercial
  langs:
  - C++
  frameworks:
  - SDL2
  licenses:
  - AGPL3
  info: >-
    Ozymandias is a fork of the Augustus project that intends to restore original
    gameplay of the Pharaoh + Cleopatra.
  updated: 2023-08-12
  images:
  - https://user-images.githubusercontent.com/918081/258870468-f009ec60-47d6-49e5-811c-2ed72f12ab7c.png
  - >-
    https://user-images.githubusercontent.com/918081/250271563-6e2358ad-82af-4374-89d1-35d56b917e1e.png

- name: Orzunoid
  originals:
  - Arkanoid
  type: clone
  url: 'https://www.ocf.berkeley.edu/~pad/game-ti85-orzunoid.html'
  development: complete
  status: playable
  langs:
  - Assembly
  licenses:
  - As-is
  info: The ultimate Arkanoid-style game for Usgard.
  added: 2026-02-28
  updated: 2026-02-28
  images:
  - 'https://www.ocf.berkeley.edu/~pad/screenshots/orz1.png'
  - 'https://www.ocf.berkeley.edu/~pad/screenshots/orz2.png'