God of War
Castlevania: Dracula X Chronicles (includes unlockable Castlevania: Symphony of The Night - Best Castlevania IMO.)
Crisis Core: Final Fantasy VII
Lumines: Puzzle Fusion
Hot Shots Golf 1/2
Metal Gear Acid
Ratchet and Clank: Size Matters
Resistance: Retribution
Tony Hawks Underground 2: Remix
These are all MUST plays.
NBA 10: The Inside if you are a Basketball fan
Star Wars Renegade Elite (Haven't played but heard great things)
Patapon(Some like, some don't)