Smokin' Guns is a free and open-source first person shooter (FPS) developed by Smokin' Guns Productions and Iron Claw Interactive. Smokin' Guns simulates America's old west, with the gameplay and locations inspired by American western movies. There are 4 game modes: Bank Robbery, Deathmatch, Duel and Round Teamplay.
Mac OS X 10.5 or newer
Intel powered Mac
64 MB OpenGL compliant graphics card
256 MB RAM
400 MB hard disk space
Free download at smokin-guns.org