Saturday, February 7, 2009
Coming this Spring, the Survival pack will allow the Death Toll and Dead Air Campaigns to become playable in Versus Mode. The Pack will also feature a new mode titled Survival. This mode will be up to four players and feature 12 maps in which players must hold out against the Zombie Horde.
To get a good picture, try to imagine Gears of War 2's Horde Mode with Zombies. No price yet for the pack, but There will also be a special Re-Release of Left 4 Dead which will include the pack. 
Left 4 Dead (Valve)
