I wish this is what we considered hardcore, it's always been what I've considered it to be. What makes Super Mario Galaxy hardcore? It's awesome. That's what. If you can play a game for hours, that game is hardcore and so are you. Nuff said.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception