1. Terraria (massive update inbound a week from tomorrow; looks like a shitload of new content)
2. Deus Ex: Human Revolution
3. MvC3 (barely remembered this one..)
Least favorite: Mindjack (it's hilarious as a rental; but my God is it baaaad)
It's been slim pickings for me this year.
Super Meat Boy would have won out for early this year, but that was a game from last year. Everything else was disqualified because it didn't impress me at all (MW3, BF3, a lot of other shooters and brawlers) or was disqualified on grounds for not actually being released this year(Starscape, the original X-COM trilogy), or because it was a remake (anything Zelda-related that I played).