Choice list, bro. I just started playing Dungeons of the Endless a few days ago. It just feels so good to play. Not an ounce of fat on it, it keeps you making moment to moment decisions. People are having trouble defining the game, but I would call it a strategy game; you're planning and executing based on the environmental conditions and your resources, switching your perspective between macro and micro. It may be my GoTY.
Wolfenstein is the AAA of the year, afaic. It's one of the few AAA games to bring together old and new design approaches into a successful, cohesive package.A surpise hit, I thought it would be a turd when I first saw it.
Or maybe DS2 is the AAA of the year. I still consider this series to be AA. It never has the best production values (actually looks worse than DS1 to me) or Hollywood names behind it. It got a lot of flack for not living up to the standard set by the previous games, but the best-in-class action-RPG combat still carried it to the top tier of games released this year. Game is massive and it still puts you through the ringer. More than any other this year, you feel like you've gone on an epic and dangerous video game adventure.