OK, if you only buy one FPS this month, make it Call Of Duty. This game rules! the best FPS I have ever played, better than Medal of Honor, better than Team Fortress, better than CS, better than any FPS out now. I am a WW2 buff, so that may sway my decision. But, it is really awsome, even the single player is good.

the best FPS I have ever played is Rainbow Six 3 and CS