While it’s not known if the 12 maps will be all new or not, GTTV reports players can set records for the ”longest time surviving” the shuffling masses.
The pack has already been revealed to include Versus mode for the Dead Air and Death Toll campaigns. The Survival Pack DLC is expected this spring, and at least free for PC.
This new Survival challenge will see ”up to four players set records for the longest time surviving hordes of zombies on over 12 maps,” notes GTTV.
Whether the Xbox 360 DLC will be offered with no price tag remains in the fog for now, though there are rumours that Microsoft is pressuring Valve to charge something.
Source: Shacknews