Halo3 for Multi Army of Two for SP as Multi is laggy and buggy as hell RBSV2 Great for Both i have around 50-60 360 Games & outa all them thows 3 only are good to me well add GoW Rly Sweet. For Upcoming Aliens CM Merc 2
Gears of War Call of Duty 4 Infinite Undiscovery (didnt come out yet) Ninja Gaiden I love the idea of Army of Two, the gameplay isn't that great though imo.
Halo 3, but it gets boring sometimes. Call of Duty 4 for multiplayer. If you have a bad connection though, you'll get mad every time. Like me.... Guitar Hero 3. Mass Effect. Gears of War. Dead Rising. Bioshock. Ninja Gaiden (both of them). GTA IV.
Assasins Creed Bioshock Call of Duty Condemned: Criminal Origins The Darkness Dead or Alive :4 Dead Rising Devil May Cry 4 The Elder Scrolls IV: Oblivion Fight Night Round 3 Gears of War GTA IV Guitar Hero 3 Ghost Recon: Advance Warfighter 1 and 2 Hitman : Blood Money Lost Odyssey Lost Planet Need For Speed: Most Wanted Rock Band Saints Row Skate Tom Clancy's Splinter Cell: Double Agent Thats about all the games that i could think of. I've played every one of these games and they're all great games. My favorite is Assasins Creed or Bioshock. I will warn you about Assasins Creed though, once you've completed it once theres no point in replaying it.