Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux. Xonotic is a direct successor of the Nexuiz Project. 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 the Nexuiz project with years of development between them, and it aims to become the best possible open-source FPS (first-person-shooter) of its kind. New trailer coming soon Please post all support issues in the forums for the game.

frostwyrm333 says

9/10 - Agree (2) Disagree

I believe that it is one of the most funny and original games out there. To most of people it will look as a cheap retextured quake 3 but the gameplay is IMO much more fun and diverse. Gameplay is FAST, you can use various tricks - bunnyhopping, jumping etc that give you incredible speed and freedom, you can practically fly around (if you know how). Speed gives you advantage and you are harder to hit, if you move slowly you lose or you are dead.

It is a great games that almost nobody never heard about which is sad, I really recommend you try it, its hard to understand how the movement "really" works but after that it is incredible fun.