We just got word from Activision that the "Chaos Pack" DLC collection is now available for Xbox 360 gamers. You can buy the pack for 1200 MS Points.
The "Chaos Pack" DLC features four new "Spec Ops" Missions (Vertigo, Arctic Recon, Light 'Em Up and Special Delivery), as well as three new "Face Off" maps (Vortex, U-Turn and Intersection). Furthermore, the new "Chaos Mode" challenges players to earn the highest possible score on fan-favorite maps (Resistance, Village, Underground and Dome) by chaining kills together as they try to survive wave after wave of enemies.
To celebrate the release of the new DLC pack, Activision has released this new trailer. The "Chaos Pack" DLC will hit PlayStation 3 and PC at a later date.