For me, it's a tossup between Crypt of the Necrodancer (it got its official release this year, so it counts) and Devil Survivor 2: Record Breaker. Both I'm enjoying immensely, even if one of them is a re-release with an extra day added onto the story (which, in context, is pretty huge).
Last minute thoughts: Wait, did the 3d Majora's Mask come out this year? Then that is my second/third. That game is amazing, but the two above, I feel, are even better. Maybe just because I prefer the Gamecube boss fights.