Valve hasn't forgotten about you, Left 4 Dead players. The studio just announced a new campaign, titled Crash Course, which will be released as a downloadable expansion inSeptember. PC gamers can download Crash Course for free, but it will cost Xbox 360 gamers 560 Microsoft Points (in real world money -- $7).

Crash Course doesn't continue where the last campaign left off, but is wedged in-between No Mercy and Death Toll. The new campaign will answer some questions and includes "new locations, new dialogue from the original cast, and an explosive finale." Though Crash Course includes Survival and co-op maps, that's not the main goal, says Valve.

I'll let Valve explain:

"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."

I've asked Valve to clarify the pay-to-play situation on Xbox 360, but let's try to forget that point for the time being. What do you think of Crash Course?

Oh, and do you want to see a really big version of that poster?