The variety map pack for the Playstation 3 version of Infinity Ward’s ultra popular shooter is now available for download through the Playstation 3 Network, starting at lunch time today GMT all experience points earned by playing CoD4:MW on-line with your PS3 will be doubled. 'Double XP Weekend' finishes at midnight on Sunday.

The Call of Duty 4: Modern Warfare Variety Map Pack features four new multiplayer maps including "Broadcast," featuring tight corridors and wide open parking lots where large groups will utilize close-quarter fighting and strategic maneuvers; "Chinatown" where night battles well lit by the full moon can play havoc against a backdrop of brightly colored lamps, antique shops and neon signs of the local district; "Killhouse," a desolate warehouse under enemy attack where squads will need to move through building mock-ups and plywood walls in order to take control of the combat arena; and "Creek," a wide open village in a heavily wooded area where battles are fought among high ridgelines and deep in underground caves.