Good news for L4D fans! There's a new free level coming out soon which contains a few surprises:
http://www.destructoid.com/left-4-dead-crash-course-announced-as-new-campaign-142454.phtml
You can read the preview here:Wah, wah, Left 4 Dead is getting no support from Valve! I guess they better put away this brand new campaign, then. "Crash Course" is coming to PC and Xbox 360, a brand new two-chapter campaign geared towards Versus Play and providing a shorter, more intense multiplayer experience. I'm the first person outside of Valve to play it, and I've been biting my tongue all week.
Crash Course is set shortly after the events of No Mercy, where it's revealed that the helicopter pilot who rescued Bill, Zoey, Louis and Francis was actually infected. The other survivors blame Zoey for crashing the chopper, since she's the one who ended up shooting the pilot. A whole bunch of new dialog has been recorded for the game, and there are one or two extra surprises in store for those who are used to how Left 4 Dead works.
I did ask Valve if it would be free but was told it could not be confirmed at the time, due to being in talks with Microsoft. Luckily, the press release we just received states it will cost 560 MS Points (boo Microsoft!), and be free on the PC. Bad news for 360 fans, great news for PC players.
http://www.destructoid.com/left-4-dead-crash-course-announced-as-new-campaign-142454.phtml