This is another year where the initial release date rules make this a tough choice. If we were going by N. American release dates, Super Mario Galaxy 2 would be an easy pick. And I’d save Xenoblade for 2012, a pretty rough year otherwise.
But rules are rules. It’s Xenoblade Chronicles for me. Best Wii game and best 7th gen game, in my mind. Brilliant storytelling, art direction, and music. Insanely deep gameplay systems and mechanics. And a peerless sense of discovery and adventure.
Vanquish, God of War III, Donkey Kong Country Returns, Alan Wake, and Reach are also outstanding games. Really good year.