Why look stuff up when you can insult people?
Action: Red Dead Redemption
Shooter: Killzone, Resistance, Bad Company 2, Bioshock, Black Ops etc
3D Platformer: Ratchet & Clank
Adventure: Uncharted, Heavy Rain
Hack 'n Slash: God of War, Ninja Gaiden Sigma 2
Role-playing: Fallout, Valkyria, Borderlands, Demon's Souls, Oblivion, FFXIII, Dragon Age
Fighting: Tekken 6, Super Street Fighter IV
Simulation: The Sims 3
Espionage: Metal Gear Solid 4, Agent
Strategy: Civilization Revolution, Endwar, Ruse, RE3
Racing: Gran Turismo 5, WipEout HD, ModNation, Hot Pursuit, MotorStorm
Music: Rock Band 3, DJ Hero etc
Flight: WarHawk, IL-2, HAWX 2
Puzzle: Cuboid, Peggle, Puzzle Quest, Shatter etc
Sports: FIFA 11, NHL 11 etc
Children: Lego Harry Potter, Ratchet & Clank etc
Notice how some of those genres would suck (or not exist) if you removed the games in bold? Halo, Gears, Forza, Alan Wake and Fable can't save the day.