Left 4 Dead DLC is free, says Valve By Patrick Garratt, Wednesday, 11 February 2009 20:00 GMT Share on: Facebook Twitter Reddit Google+ Valve’s confirmed that the recently announced Left 4 Dead Survival Pack isn’t going to cost a bean. Here’s the proof. The pack includes and all-new play mode, Survival, and two new campaigns for Versus mode. Free. Free. And once more: free.