The only new 2012 games I played were Mass Effect 3, Legend of Grimrock, Game of Thrones, Far Cry 3, Dishonored and Walking Dead.
Out of these, I suppose the line is a bit blurred since nearly every game is a sort of hybrid, Shooter/RPG, Point and Click Adventure/RPG, Action/RPG, etc.
Although it was certainly an RPG, I found Game of Thrones to be a rather flawed game. The story was somewhat entertaining because I loved the Song of Ice and Fire series but the combat gameplay, environments and character progression were all awkward in their design and unsatisfactory.
On the other hand, The Walking Dead, Dishonored, Grimrock, Far Cry 3 and Mass Effect 3 were all pretty good games, although the extent of their "RPG-ness" may be questionable for some of these games.