Today, Xbox One and Xbox 360 owners will get their hands on the first DLC pack for Call of Duty: Advanced Warfare. The Havoc pack includes four new multiplayer maps, a new weapon, a custom weapon variant, and the new Exo Zombies co-op mode.
Call of Duty: Advanced Warfare Havoc includes four new, epic multiplayer maps, access to the versatile AE4 directed energy assault rifle, the AE4 Widowmaker custom variant, plus an exciting all-new zombies cooperative mode called Exo Zombies.

Havoc's four new, exotic and diverse multiplayer maps are set around the globe and are tailor-made for players to unleash their exoskeleton's abilities:

Core: Deploy to the Gobi desert where the ravaged ruins of a nuclear fusion plant set the stage for a high-octane warzone. Take down enemies through the wreckage in long-range combat or get up-close and personal in the tunnels surrounding the central turbine. Activate decontamination drones using the map-based scorestreak to help clean out the competition.
Urban: Prepare yourself for brutal, high-speed combat in Dallas Ward 3, a future mega structure, funneling players into a close-quarters free-for-all. This modular compound's verticality unleashes the exoskeleton's capabilities. Stay focused during the timed event as blast doors alter the map's flow and sightlines.
Sideshow: In the shadow of Devil's Tower, Wyoming, this abandoned inn's open layout amplifies its creep factor. Blast your way through the clown inn with close-quarters battles or use long-range site-lines from the mining facilities and natural terrain. Use the map-based scorestreak to activate the lights, music, and magic of the clown marquee and rain down a barrage of rainbow smoke-trailed cannonballs.
Drift: An idyllic ski resort high in the Rocky Mountains is transformed into a festive high-altitude playground, perfect for an all-out firefight. Make your way to the highly contested over watch in the glass observation deck or take a ride on the carousel to deliver 360 degrees of carnage. Players can use the map-altering timed event to their advantage as an avalanche of snow and debris disorients players, intensifying the battle.

Havoc includes a new cooperative experience, Exo Zombies. Featuring a story told through the eyes of four employees of the Atlas corporation and played by a celebrity cast consisting of John Malkovich (In the Line of Fire, RED, Burn After Reading), Bill Paxton (Aliens, Titanic, Edge of Tomorrow), Rose McGowan (Planet Terror, Scream), and Jon Bernthal (Fury, The Wolf of Wall Street), Exo Zombies ushers in a new breed of zombies and a truly unique experience, all included first in the Havoc DLC Pack. The actors provide their voice over and likeness in a dark and cinematic adventure new to Call of Duty: Advanced Warfare. These four performers help enlist players into a world where a DNA bioweapon unexpectedly spawns a bloodthirsty, ravenous mutant horde infecting a secret Atlas research facility and sending personnel running for their lives. Following a failed evacuation, four survivors, un-trained and underprepared, must face the most vicious mutations ever unleashed.

The pack is obviously a timed exclusive for the Xbox platform. If I were a betting man, I would bet that other platforms will get this DLC in about a month. You can get the Havoc DLC for $14.99 (USD) or as part of the $49.99 Season Pass.