Let's see... Are you into FPSs? I hope so, alot of games for the penguin are
. Here they are:
Return to Castle Wolfenstein
Quake 3, 2, 1
Doom 1, 2, 3, Ultimate, Final
Enemy Territory
Soldier of Fortune
Sin
and tons more I can't mention
. But, if you want to buy some native Linux games, try going here:
http://tuxgames.com
PS: MNKyDeth, this would be good to add to the list
:
http://icculus.org/lgfaq