First of all, I don't know if I should post this in the gaming forum so please tell me to do so if necessary. Ok. I was wondering if FPS games will run in Ubuntu. Games like F.E.A.R, Stars Wars Battlefront 2, Enemy Territories, etc. Thank you for any feedback.

F.E.A.R. won't run since I know a guy who tried to. No go . But others like Doom 3 and Enemy Territories might/will work. Check out this list.

You could also try Wine. I've heard of people playing HalfLife 2 on it successfully.

Yeah HL2 works with Wine. But unfortunately, FEAR doesn't work on that either. Most people aren't able to install the game and those who can, can't run it.