Crash Course

Crash Course is the first DLC campaign for Left 4 Dead. It is free on the PC, but normally costs 560 Microsoft Points for the Xbox 360. It was released on September 29th 2009. According to Valve, it is meant to bridge the gap between No Mercy and Death Toll.

Crash Course begins shortly after the events of No Mercy. The helicopter pilot from the Rooftop Finale finally succumbed to the Infection and was killed by Zoey mid-flight. With no pilot, the helicopter soon crashed, leading to the campaign's starting point. From the crashed remains of the helicopter, the Survivors must traverse through the nearby alleys to get to a truck depot where an armored truck must be lowered to escape the town.

Released in Crash Course
(Note that of these features only apply to Crash Course)


 * Sometimes only one or two of the second tier weapons spawn at a spawn site.
 * Alarmed cars now spawn at different locations.
 * Sometimes rooms that may contain items are barricaded.
 * New dialogue for Zoey, Louis, and Francis.
 * 10 new Achievements.
 * 2 new Survival maps.

Walkthrough
Below is a complete list of video walkthroughs of the 2 levels:


 * 1) The Alleys
 * 2) The Truck Depot Finale

Please know that the gameplay videos are on each campaign's info page not on each map page.

Achievements

 * See Main Article: Achievements