While on the topic of Linux Gaming

[Stephen]

http://www.zdnet.com/blog/hardware/doom-3-source-code-released/16486

Carmak Released Doom3 Source code under the GPL. you still need to buy
the game for the textures ect, but the guts of the program is
available...

-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen