Eh, I played Halo through on co-op on legendary out of pure boredom, and I never liked it much. I don't see what's imaginitive about it, most of the levels looked the same (even the ones that aren't earlier levels with you running the other way), the enemies were honestly stupid, I don't know what the talk about AI is, and the game is plain boring. I played Halo 2 for about an hour, hoping for the hype machine to deliver. Unfortunately, it didn't, and I went back to playing Sid Meier's Pirates!, a better game in almost every way.