Xonotic
What is Xonotic?
Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux. The project is geared towards providing addictive arena shooter gameplay which is all spawned and driven by the community itself. Xonotic is a direct successor of 
Nexuiz with years of development between them, and it aims to become the best possible open-source FPS (first-person-shooter) of its kind.
Nexuiz with years of development between them, and it aims to become the best possible open-source FPS (first-person-shooter) of its kind.
This is like all Quake 3 and Unreal Tournament games + mods and all even known together!
Great Solution - Great Game!
Xonotic is nexuis improved version. In my opinion it has less people playing but you should definately give it a try it is 2 times better than nexuiz
Open source, fun, and a great game to play with friends while also testing your machines at the same time!
A very well designed, fun, and customizable game.
Inspired by Unrael Tournament (1999). The traces of it are everywhere, from level design to music. Some of the weapons literally copy the behavior of UT. Unfortunately, the common design not so strong as in UT. I consider it like UT-lite)
It's continuously developed Unreal Tournament 2004 for Linux.