1. Dark Souls
Ridiculously amazing game once you get into it...it's just perfect, imho.
2. The Walking Dead
Fantastic story/characters, heart warming and heart breaking at the same time... loved it.
Absolutely beautiful game with haunting music. And it's also a really emotional experience... loved it as well.
4. Spec Ops: The Line
The game that left the biggest impression on me...it is the most disturbing game I have ever played and apart from the mediocre shooting it is... I don't even know how to explain it. This game made me sick and I really respect that.
5. Alan Wake
Outstanding first half, decent second half.
6. Far Cry 3
Pretty, a lot of fun to play, Vaas is fantastic, and all the "drug related" stuff is pretty cool, too.
7. Diablo III
It does not really have that old Diablo feeling and there are a couple of things i did not like, but I still had a lot of fun with it.
8. Tribes Ascend
Probably the only new (relatively) "big" skill based FPS out there, which is sad. It's also a really good game and it's free to play.
9. Mark of the Ninja
The best stealth-action 2D platformer I have ever played.
10. Borderlands 2
I didn't have as much fun with it as with the first one, but it's a good game.