Get ready for some wild multiplayer action as we celebrate the release of the Call of Duty® 4: Modern Warfare™ Game of the Year Edition with a LIVE Fire Weekend. We've got a 72-hour Play & Win Sweepstakes, a special GamerchiX event, an opportunity to play against the development team from Infinity Ward, and even a chance to mix it up with Mixed Martial Arts champion Jens Pulver.

Register your gamertag now and get ready for a whole weekend of fun and competition! Then, from 12:01 A.M. (ET) on Friday, April 18, 2008, until 11:59 P.M. (ET) on April 20, 2008, you'll get an entry into the sweepstakes every hour when you play a multiplayer Call of Duty 4 session on Xbox LIVE®.

We've got a whopping 72 prizes to give away (one for each hour), so the more you play, the better your chance to win. The Grand Prize package includes an Xbox 360 Elite console, VIP Accessories kit, Call of Duty 4 merchandise, and lots more!

You can also register by downloading the free Call of Duty 4 LIVE Fire Gamer Picture from Xbox LIVE Marketplace.

Get more details on the Play & Win Sweepstakes.

NO PURCHASE NECESSARY. Open only to legal residents of the 50 United States (includes the District of Columbia) and Canada 18+. Skill-testing question required for Canadian residents. Game ends April 20, 2008. For details including free, alternate method of entry, see the Official Rules.

Three-time UFC lightweight champion Jens Pulver is in training for his upcoming featherweight match with the WEC champion Urijah Faber, and he plans on relaxing by playing Call of Duty 4 with Xbox LIVE members Saturday, April 19, 9:00 – 11:00 P.M. Eastern time (6:00 - 8:00 P.M. PT). Check in, look for the Gamertag COD4JensPulver and take on one of the best cagefighters in the business!

Click here for more information on the Game with Fame event.

This is your opportunity to compete against the Infinity Ward team in Call of Duty 4 and get the inside info on the game. On Friday, April 18, the game developers will be online from 6:00 - 9:00 P.M. Eastern Time (3:00 - 6:00 P.M. Pacific Time) to challenge the Xbox LIVE community. Look for these Gamertags:

• fourzerotwo
• COD4Chance
• COD4Justin
• COD4Ed
• COD4David
• COD4Neel
• COD4Geoffrey
• COD4Jon
• COD4Jeff
• COD4Drew
• COD4Ryan
• COD4Todd
• COD4Joel

Get more details on the Game with Developers event.

Got the new Call of Duty 4 Variety Map Pack? Check.
L33t pwnag3 skillz? Check.
A desire to get beat by a girl … ?

If you fit this description, get ready to take on members of the Xbox GamerchiX in "Not Just for Ladies Night." The 'chiX are taking over the new Call of Duty 4 maps on Saturday, April 19 from 6:00 - 8:00 P.M. PT (9:00 - 11:00 P.M. ET). Don't miss your chance to play against these gamer girls!

Look for these Gamertags:

Are you a novice gamer, new to Call of Duty, or just want to play with someone who won't laugh when they kill you? You're in the right place. On Sunday, April 20 many of the Xbox Ambassadors will be on Xbox LIVE and ready to play. Shoot 'em a friend request—we promise they'll go easy on you.

Look for these Gamertags:

• Call of Duty 4: Modern Warfare Game Page
• Play & Win Registration
• Play & Win Official Rules