When the zombie disaster arrives, the good people at Valve will certainly outlive us all. They already have ample skill in the zombie killing business thanks to the 2008 launch of Left 4 Dead – and here we are just one year afterward, with L4D2! Valve got many heat for launching a follow-up so soon after the original dropped, but create no mistake, this is no growth. There are new campaigns, new impure, new weapons and new game types to satisfy your craving for appetizing brains.