FEAR is one of the best offline FPS Ive ever played...if not the best ever...

..but online its forgettable. Its just a brainless run around shooting game with forgettable maps designs. In fact, the gameplay online is similar to HL2 and DOOM3.

About Quake 4, I havent played the 360 version but I have the PC version. Offline is alright, but never as good as FEAR.

Online its almost a clone a Quake 3 Arena on DC/PC. Same gameplay, same voice announcer, almost exact similar maps, 16 players....just overall much better graphiccly. If youre a fan of Q3...then this game is for you.