Cube is a free and open-source 3D multiplayer and singleplayer first person shooter (FPS) game. The game is designed primarily to show the Cube engine's capabilities, featuring 37 SinglePlayer maps and 65 DeathMatch multiplayer maps with 102 maps in total.
Mac OS X 10.4 or newer
Intel or PowerPC powered Mac
475 MB hard disk space
OpenGL compliant graphics card
Free download at cubeengine.com