Since its release in 2002, Xbox Live has been a staple in online console gaming. Years later some players even make their buying purchases based on the small green and gold lettering in the top right corner of game boxes. No online? No buy! We've heard it, thought it and even wrote it all over X3F. This year brought us some incredible online gaming experiences from the Gears 2 Horde Mode to an all out Zombie Apocalypse in Left 4 Dead, here are the nominees for Multiplayer (Competitive and Cooperative) Game of the Year.