Valve Software has sent word that the recently announced Left 4 Dead DLC for the Xbox 360 and windows PC will be totally free this spring.

The recently announced Left 4 Dead Downloadable Content (L4D DLC) will be delivered to Xbox 360 and PC gamers free of charge.

Due for release this spring, the DLC for 2008’s best-selling new game property on the PC and Xbox 360, is dubbed the L4D Survival Pack and introduces a new multiplayer game mode entitled, Survival, plus two complete campaigns for Versus Mode (Death Toll, Dead Air). A Critic’s Choice Edition of the game will be heading to retail stores this spring, and will include access to all the content introduced in the L4D: Survival Pack.

Left 4 Dead is a survival action game from Valve that blends the social entertainment experience of multiplayer games such as Counter-Strike and Team Fortress with the dramatic, narrative experience made popular in single player action game classics such as the Half-Life series of games. Released in November of 2008, L4D has earned over 25 industry awards from outlets around the world.

For more information, please visit www.l4d.com.