So there are a few must have games if you have a 360, okay the first one is easy, halo 3 is probably the most addicting games I have ever played. The single player isn't that great so you need Xbox live for the halo 3 experience. And another must have game is rockband/guitar hero. In my opinion ( and many other peoples opinion) rockband is better, a lot better. It gives you more to do but it is a lot more money then guitar hero, If you can only get one get rockband, this is a whole new expeince for videogames, if actually feels like you are a rock star when you are playing this. Okay, if you like rpg's then you will want to get Oblivian, it is a fantastic game and is also very addicting. There are tons of things you can do in the game. Last on my list but not the least, Call of Duty Four has a great multiplayer and single player. The maps are very fun and you can get a lot from this game, the online ranking system just puts a whole other level to the game play.