Just when you thought Valve was done with Left 4 Dead and ready to move to the controversial Left 4 Dead 2 new DLC is announced! Coming to the original Left 4 Dead, Valve has just announced “Crash Course” a new campaign set in between the “No Mercy” and “Death Toll” campaigns.

“While containing both Survival maps and a Co-operative Campaign, the primary goal of “Crash” is to deliver a complete Versus mode experience in just 30 minutes, resulting in a streamlined version of the game’s existing Versus campaigns. A recharge timer for infected teammates has also been added, and item spawn behavior has changed for more balanced gameplay.”

“Crash Course” will release in September for 560 MS points, so no need to sell that copy of Left 4 Dead just yet!