What xbox 360 games to buy?

I have to say a game that has been completely shunned since it's launch has been Prototype, I don't see why it's an amazing game, great story, long campaign, nice visuals, surprisingly streamlined gameplay, just plain awesome abilities. Another one you need is Dead Space, Left 4 Dead games, Fable series is awesome and I don't care what anyone says GTA San Andreas is still fun sh*t. I've got a lot of the same games so you'd probably like those ones too. If you into strategy I recommend Tom Clancy's Endwar it is just like Prototype completely ignored even though it's a great game, you have to be in to strategy and that stuff for it though.