[ ULTIMIT ]

A gaming-first Linux desktop for people who grew up wishing their computer looked like Altimit OS from the .hack games: a dark icon rail, crystal-shard wallpapers, hexagon grids, bracketed type and glass windows that open like a console line drawing itself.

Ultimit is built on Ubuntu 26.04 LTS. It is its own Wayland compositor and desktop shell, not a theme on top of another desktop.

Status: 1.1. It runs as a daily desktop on the developer's machines. Send a report (Settings › About › Save a report) when you hit a rough edge.

Goals

1. Games work without fuss. Steam and Proton, NVIDIA and hybrid laptops, fullscreen direct scanout, VRR and tearing control. A desktop decision that costs games frames or latency is the wrong decision. Games confirmed working, with the settings they need: docs/games.md.
2. It looks like nothing else. The approved design lives in docs/design/mockup.html. Open it in a browser and click around; it is the reference for every screen.
3. It installs on plain Ubuntu. Ultimit is a thin layer over a well-supported base: Ubuntu's own packages and updates, plus Ultimit in /opt/ultimit.

Install

• A new PC: the Ultimit ISO. Boot it from a USB stick, and the Ultimit installer asks a few plain questions (Wi-Fi, which drive, your name and password) and installs Ubuntu 26.04 with Ultimit: no desktop to remove, the NVIDIA driver when needed. Build it with scripts/build-iso.sh from a release; see docs/iso.md.

Keeping Windows? Shrink it in Windows first. The installer puts Ultimit in free space next to Windows and never resizes Windows itself. Before booting the USB stick: Windows' Disk Management › right-click (C:) › Shrink Volume by 50 GB or more, leave the space unallocated, and turn off Fast Startup. Details: docs/iso.md.

• An existing Ubuntu 26.04: clone this repository and run scripts/install.sh. It builds Ultimit into /opt/ultimit for every user and replaces GNOME (--keep-gnome keeps it); see docs/install.md.

Updates

Ubuntu's packages update the Ubuntu way. Ultimit updates from this repository's releases: the desktop says when a new one is out, and Settings › Updates installs it. See docs/updates.md.

Layout

Path	What lives there
docs/design/	The interactive design mockup
docs/architecture.md	Stack choices and why
docs/install.md	Installing on another computer, updating, removing
docs/iso.md	The Ultimit ISO: Ubuntu's server installer, patched to set up Ultimit
docs/games.md	Tested games: which work, with which Proton and launch options
docs/updates.md	Updates: Ubuntu's packages the Ubuntu way, Ultimit from GitHub releases; publishing one
scripts/install.sh	The installer (builds the libraries, installs to /opt/ultimit, sets up the login screen)
assets/fonts/	Michroma, Chakra Petch, Share Tech Mono, Oxanium, Saira, JetBrains Mono, Space Grotesk, Inter (SIL Open Font License, licences beside them)

Credits

The look is a tribute to Altimit OS from .hack by CyberConnect2 and Bandai Namco. Ultimit is an unofficial fan project. Its emblem, wallpapers and code are original.

Successor to nekOS.

License

MIT. See LICENSE.