Could you recommend me some FPS for PS3?

I'm looking for a not too realsitic setting. I mean not like COD; more like Quake or Doom or Crysis. And action should be fast paced. For example, Half-Life is good but the shooting portion is kinda low on action for me. I like that there are exploration and all but when it's time for action, I want action-packed shooting too. And also, could you also specify if the game has good replay value for single player (i.e. there are bots that you can just challenge). Im not too keen on network play because PSN is too slow where I'm at. Thanks!