Best EVER xbox game?????

fallout3, tes: oblivion, unreal tournament 3 has a campaign that wont take a week but its like halo with the online play, singularity was an interesting game, again with online play to keep you busy, umm and thats all the games i can think of right now. but yeah, fallout3 and oblivion are really good games. theyre also made by the same people so theyre alike in a way.