The pack adds the new mode "Clean Sweep", which is briefly described as "an elimination mode where players must rely on their own skill and teammates' expertise to prevail as the winning team." It will be playable on four maps, including two new arenas: Bagram Hangar and Khyber Caves. The other two maps will be redesigned versions of Diwagal Camp and Kabul City Ruins.
Shacknews contacted EA for information about the omission of a PC release as well as more details on what this mode actually entails, but was told that the company doesn't have "any further news" at this time.

Like the others have said, I'm enjoying it, as well. My skill rating finally broke 2000, tonight.
Guess you have no idea how popular zombies are in Treyarch's games. Not such a 'freakin stupid idea' at all.
I like it too, of course I'll be getting cod next month but only because my friends are, I'll play the shit out of both ...