Well we had lots of great games this year. Portal God of War 2, Halo 3, Bioshock, and Super Mario Galaxy. And the there was Call of Duty 4... I dunno I thought it was a good game but only good. I couldn't stand the graphics with the ugly piss filter, the multiplayer was fine but didn't have that many game modes and features, I got bored of it fast. The gun sounds were awful. The campaign was good but not exceptional. Maybe an 8/10 game but when I compare it to other shooters like Halo 3 that had beautiful graphics, co-op for different modes, fun maps, awesome campaign that you can play with a friend not to mention the forge mode. COD4 just looks pathetic.
My pick for Game of the year would definitely have to be Super Mario Galaxy. It's just one of the most inventive and fun games Nintendo has ever made. And it still holds up to this day.