Warsow is set in a futuristic cartoonish world where rocketlauncher-wielding pigs and lasergun-carrying cyberpunks roam the streets. It is a completely free, fast-paced first-person shooter for Windows, Linux, and Mac OS X.

Speed and movement is what Warsow is all about. Like a true cyberathlete you jump, dash, dodge, and walljump your way through the game. Grab power-ups before your enemy does, plant a bomb before anyone sees you, and steal the enemy’s flag before they know what is going on!

Our goal is to offer a fast and fun competitive first-person shooter without hard graphical violence - Warsow has no blood or guts flying around. Red stars instead of blood indicate hits and colored cubes replace guts as gib effects.
 
http://www.warsow.net