CS:SO map designed for upto 6 players and casual game mode.
To play this map:
1)Save the .bsp and .nav files to your CS:GO maps folder(eg: E:\Steam\steamapps\common\Counter-Strike Global Offensive\csgo\maps).
2)Launch CS:GO.
3)Open Developer Console(default is "`" key).
4)Type "map onevsone" and click submit.