This is really hard, there are alot in my mind, so here goes:
Castlevania Lords of Shadow:
Amazing game, better than almost every single Action/Adventure or Hack n Slash game I played, loved every moment, but Castlevania Lords of Shadow 2 will be the real deal.((it will be the brightest of em all, I am sure of it, CLoS.2 is my most anticipated title))
Darn it, I had so much fun with it, really enjoyed every single moment of it, both Darksiders I & II are gems of this generation that one shouldn't miss.
Batman Arkham franchise:
Seriously one of the best superheroes game ever, it is the definition of Superheroes game, I was so immersed and felt really like Batman, Asylum was amazing, and City was even bigger and better, I hope Origins continue on the trend and doesn't stumble.
that's about it, one honorable mention though would be Dead Space, but sadly after the first one the game lost it's shine.