Activison have revealed that the Call of Duty 4: Modern Warfare Variety Map Pack has hit half-price on the Xbox Live for a limited time.  Starting today and running through until 8.00pm on Sept. 14, Activision blockbuster DLC by Infinity Ward will be available for 400 Microsoft Points.  As part of the limited time offer, Xbox LIVE will also will host a Double XP Weekend, allowing players to earn twice as many Experience Points.  Additionally, during the release, the limited edition Prestige gamer pics will also be made available, for free download on Xbox Live Marketplace.

Members of Infinity Ward will also be online between 8.00pm – 12:00 am/GMT on Saturday, September 13 to play with fans.  While online, players should be sure to add the following Infinity Ward gamertags to their friends list:

The Call of Duty 4: Modern Warfare Variety Map Pack includes an adrenaline-pumping four Modern Warfare maps.

“Broadcast” features tight corridors and wide open parking lots where large groups utilize strategic maneuvers through close-quarter fighting

“Chinatown” delivers the action by the full moon against a backdrop of brightly colored lamps, antique shops and neon signs of the local district

“Killhouse” is a desolate warehouse under enemy attack where squads must move from building to building to full take control of the combat

“Creek” is a large open village nestled in a heavily wooded area, where games will fight between high ridgelines and deep in underground caves

More details on the Call of Duty 4: Modern Warfare Variety Map Pack, Double XP weekend and information regarding terms, conditions, and official rules are available on the official event page:  www.infinityward.com.