Epic Games and Microsoft have teamed up to gift you the new Versus Booster Map Pack.
The pack contains two brand new maps (Bulletmarsh and Clocktower); the other three have already been released in the Horde Command Pack.
The developers have also got together with Paramount Pictures to come up with a challenge for gamers. Epic have thrown down the gauntlet to their fans and are offering them the Mission: Impossible - Ghost Protocol Weapon Skin Pack which includes The "Ghost Protocol" Lancer, a Hammerburst, a Retro Lancer, a Gnasher Shotgun and a Sawed-off Shotgun.
All you have to do to get your hands on the loot is watch the trailer for the new Mission: Impossible movie (on Xbox LIVE) and then complete the Gears of War 3 campaign on Insane Difficulty before December 25 (either in single or multiplayer).
That's a nice and easy challenge then! Good luck.