If heading to Mercy Hospital has become a little too tedious, then chin up as Valve has officially released Crash Course, the latest DLC pack for Left 4 Dead, which includes 10 new achievements and will run you 560 MS Points – although, it’s free for those of you zombie killers on the PC.

The expansion adds a whole new campaign scenario to the game, starting with the survivors right after their rescue helicopter from the No Mercy campaign crash lands on the outskirts of town. This two chapter campaign includes all the standard goodies, such as Co-op, Survival and Versus action.