Thanks for all the sources. Keep 'em coming!
Current standings:
Mass Effect 2 - 43.5
Red Dead Redemption - 33.5
Super Mario Galaxy 2 - 11
Heavy Rain - 5.5
Bayonetta - 2
Minecraft - 2
StarCraft II: Wings of Liberty - 2
Alan Wake - 1
Assassin's Creed: Brotherhood - 1
Bioshock 2 - 1
Fallout: New Vegas - 1
Halo: Reach - 1
Super Meat Boy - 0.5