Downloadable Content

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


 * Make the Death Toll and Dead Air campaigns available for versus mode.
 * Add a new multiplayer gametype; "Survival", which will put the Survivors against waves of the Infected.
 * Survival mode will have 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.

According to Valve, the Survival Pack is due to be released in the Spring of 2009, on April 21st.