Activision and Infinity Ward have announced the launch of Call of Duty 4: Modern Warfare Game of the Year Edition which features a token to download the Variety Map Pack, a series of four new multiplayer maps now exclusively available for Xbox 360. To celebrate the launch of the Call of Duty 4: Modern Warfare Game of the Year Edition and the Variety Map Pack, Xbox LIVE will host a Double XP Weekend. Starting on Friday, April 4 through Sunday, April 6, players can earn twice as many experience points as they play the new maps on the Variety Map Pack specific playlists. Press 'read more' for details.