Even though Left 4 Dead 2 is on the way to Xbox 360 this Fall, doesn’t mean that more content can’t come to the first game. So it does, as Valve announces ‘Crash Course’, a new single-player, multiplayer, and versus mode campaign coming soon to the game.

The content will tie together the ‘No Mercy’ and ‘Death Toll’ campaigns in the game, and takes out the helicopter rescue at the end of ‘No Mercy’ out. New locations, dialogue and a new finale will be added.

“Since the release of Left 4 Dead last November, the design team has been excited about creating new experiences for this world and allowing players to do the same, by releasing much of our internal toolset, like the Survival Pack and Authoring Tools,” said Gabe Newell. “We’re working with the fans toward the ongoing entertainment value of the product.”

‘Crash Course’ will hit the Xbox LIVE Marketplace this September for 560 Microsoft Points.

Left 4 Dead On A Crash Course To New DLC [Kotaku]