Downloadable Content

The first Downloadable Content (also known as DLC) for Left 4 Dead was confirmed by Valve Corporation on February 5, 2009. The content is offered to both PC and Xbox 360 players, and is a free addition to the game. It is available through Steam and Xbox LIVE. The pack has been dubbed the "Survival Pack", and features many new things.


 * The Death Toll and Dead Air campaigns are now available for versus mode.
 * A new multiplayer gametype; "Survival", which will put the Survivors against waves of the Infected.
 * Survival mode has 16 available maps and all but one of them are taken from existing campaigns, though they are modified to remove things such as closets and other such choke points often exploited by Survivors in Crescendo Events and Finales.
 * A new map, called The Last Stand, for Survival mode.
 * The Source Software Development Kit will be released in this pack to the PC version, allowing the creation of custom Left 4 Dead campaigns which players will be able to find via the matchmaking system. This feature is going to be free to both PC and Xbox 360 players.

The Survival Pack was released on April 21st.