Halo 3

Picked up Halo 3 on Thursday and played about an hour of campaign mode. First impressions: improved graphics, more difficult enemy AI, better weapons and vast maps. What I'm still getting used to: new control layouts for reloading and double-wielding. So far, it's pretty awesome (but not nearly as graphically impressive as Gears of War or BioShock). I also tried three player campaign co-op and that was fun. Can't wait to try multiplayer with the guys and the replay function. Will be playing this game for years!