The Lord of the Rings: Conquest (them bitch closed it on PS3 grr)
Uncharted 2: Among Thieves (Even though it's praised a lot, it's not praised enough)
Transformers: War for Cybertron (Just very fun)
Bionic Commando (Although very buggy it's very cool)
Warhawk (Well Warhawk is only about the multiplayer so since Warhawk is underrated..)