For exclusives:
I really enjoyed Batman: Arkham Asylum which has been out for well over a year now...maybe even two. Batman: Arkham City releases in the future.
MLB 11: The Show which just released. Awesome baseball series.
These are the only games I've owned for PS3 as I mainly use it for DVD/blu ray and do most of my gaming on the 360 as I find it's online service is far superior...although you are paying for it where PSonline is free.
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