I only played two games that were released this year, and one of them is a borderline case.
The games being: Hydrophobia: Prophecy, and Kingdom Hearts Re:Coded.
Beyond that, all the games I played over the last year were released before 2011, but all of them were great.
Let's go through them now...
BioShock (07) - Damn fine game. I don't care if it's overrated, it's still really amazing.
The Elder Scrolls 4: Oblivion (06) - Yes, I know that I should have waited for Skyrim, but it came with Bioshock, and so it was a nice graduation gift to myself. Another damn fine good game, made even better with countless mods.
Kingdom Hearts 358/2 Days (09) - The first game I bought for my brand new (Well, new to me) DS, acquired from a friend for an absolute steal of $40. Not as good as the other Kingdom Hearts games, but still really damn good.
Kingdom Hearts Re:Coded (11) - An awesome game. I like it better of the 2 DS Kingdom Hearts games.
Kingdom Hearts Re:Chain of Memories (08) - Pretty good. Haven't played that much of it, though.
LEGO Star Wars: The Complete Saga (07) - Played both the Lego Star Wars games before, but sold them to get this for the Wii. Very good.
Prince of Persia (08) - Pretty good. Got it on a Steam sale for about $5, so I got my money's worth out of it.
Hydrophobia: Prophecy (11) - An alright game. Another game I got on a crazy Steam sale ($3 this time). Haven't played that much of it, due to a crappy computer at the time.
Borderlands (09, I think) - Awesome game. Yet another crazy bargain ($5 for the game.). Lots of fun.
Dragon Age: Origins: Ultimate Edition (09, I believe) - Awesome, awesome, AWESOME game. Got this one recently, so it's still pretty awesome.
That, and I spent most of my time revisiting old favorites, namely Mass Effect 1 and 2, Torchlight, Kingdom Hearts 1, Kingdom Hearts Birth by Sleep, Dissidia: Final Fantasy, LittleBIGPlanet PSP, and Final Fantasy VII on PSN.
So overall, pretty damn awesome gaming year.