Now Cube looks like a great one. A first person 3D game engine, free code and as in free beer. It is only 8 megs in size and has in game map editing. Oh and there is an article, Free Frags with Cube: The Linux First-Person Shooter over on O’Reilly Network. Only problem is it doesn’t run on OS X. Have not had a chance to actually play the game yet, less than 56k speeds now.