Skyrim is easily the most overrated game of the entire video game history. Its fighting is better and more fun than other TES entries, the sceneries are stunning and for once the characters look good, true. But its factions quests are abysmally bad, it's dungeons are more linear and formulaic than a CoD clone, it continues the incredible dumbing down and consolization of the serie (managing to make Oblivion looks vastly better in comparison, which is some kind of an achievement incredible in its own right), the level scaling is nearly as [mentally challenged] as Oblivion and, as usual, destroys any feeling of progression and it manages the paradox of being a complete sandbox game which has at the same time about zero amount of RPG and actual choice.
So no, [gently caress] this. It's great as a walking simulator, but even with mod I still couldn't find it interesting enough five years later to finish the main quest. That's saying a lot.
Now that the elephant in the room has been dealt with, let's see the rest :
There is Minecraft, for which it is the year of the actual release.
There is Dragon Age II, which was a complete slap in the face and terrible in every aspect but the writing. I could spend hours facepalming at the utter trash it is, but it was (justifiably) panned enough to be redundant. But still, that was shameful.
Crysis 2 follow the sad and long string of sequels which completely ruins the serie by ignoring everything single thing that made the predecessor great, so to the trash bin too.
Witcher 2 hopefully is not this trend, with a great story well-written and real RPG. Too bad it was just as horribly consolized as Skyrim, but still it was pretty rad.
Portal 2 obviously was also great, a REAL sequel - though I still prefer the freshness of the first one.
Trail in the Sky was a very nice JPRG (that is, story-based adventure game with next to no actual RPG), with tons of content and a charming cast.
Deus Ex : Human Revolution is a major one. It's, as usual, very consolized, which is bad. It also had a completely unbalanced gameplay (hacking gives you resources while managing to find password doesn't, so well... killing is noisy while neutralizing is silent, which makes little sense...) which kind of force you into one way. But it's one of the rare games which truly asks questions about the world and the future, and manage to make you think without giving you easy answers. And a terrific art direction.
On the whole, it was a rather poor year for me - probably because many of the more ambitious games were on console and the rise of indie games hadn't yet begun. So despite the quality of writing and artistic design of both TW2 and DE:HR, I'd say Minecraft easily dominates with its insanely innovative and player-empowering concept.