Campaign is fun, average but fun, especially with 4 player online co-op. I played Halo 3 campaign more (time spent, not number of times beaten it) in 2 months than I did any other FPS campign (including Half-Life 1 and 2) over their lifetime and I continue to play it here and there. Halo 3 also has, imo the strongest multiplayer of any FPS as well. I'll note that these threads are pointless. If you hate Halo 3, then don't play it, for those who do, they'll play it until either it dies (it'll take a LONG time to do so) or they do, no one really changes their opinion based on others. So please stop with these.