Ten days following its U.S. release on November 6, Activision's Call of Duty 4: Modern Warfare will invade the Xbox Live online entertainment network for a 72-hour Play & Win Sweepstakes full of games and prizes beginning on Friday, Nov. 16 at 12:01 EST. Hourly prizes will be awarded all weekend, including Call of Duty 4: Modern Warfare shirts, Infinity Ward autographed posters and Xbox Live point cards. One Grand Prize winner also will receive an Xbox 360 Elite console and a Limited Edition Call of Duty 4: Modern Warfare faceplate, among other items.

Friday, Nov. 16 â€" Sunday, November 18 â€" Play and Win.

Register and Play COD4: Modern Warfare on Xbox Live during the weekend and win an Xbox 360 Elite, Infinity Ward team autographed Call of Duty 4: Modern Warfare swag, limited edition Call of Duty 4: Modern Warfare faceplates, Xbox 360 accessories, Microsoft Points and other great Call of Duty 4: Modern Warfare prizes. There will be one winner for every hour that weekend (72 hours) as well as the grand prize which includes the Elite, autograph swag, faceplate and accessories. (The hourly winners get Call of Duty 4: Modern Warfare poster, t-shirt, and MS Points.)

Friday, Nov. 16 â€" 6pm -9pm EST â€" Play with over a dozen gamers from developer, Infinity Ward.

Saturday, Nov. 17 â€" The PMS Clan joins the online action for Saturday night gaming.

More details on registering for the Call of Duty4: Modern Warfare Live Fire weekend and information regarding terms, conditions, and official rules are available on the official event page: www.xbox.com/livefire/. Registration is open now and will end at 11:59pm (ET) on November 18, 2007.