I gotta agree with CGI on Condemned. It was one of the first games I played this generation but the intense atmosphere and unparalleled visceral combat tied into a good suspense story with great set pieces (the manikin shop in particular) lead to a game that really blew me away.
My other surprise favourites would have to be Crackdown, Valkyria Chronicles, Dead Space and... I can't think of a 5th surprise hit but there are a ton of games I want to try out that I haven't that others have listed here like Tales of Vesperia, Demon Souls, and Batman:AA.







