The long awaited DLC for Left 4 Dead 2, Cold Stream, has been released, bringing with it a new campaign, the remade original Left 4 Dead levels, multiple mutations and new additions to the Source Filmmaker.
After over a year of public testing, Valve will officially launch Left 4 Dead 2's Cold Stream DLC for PC and Xbox 360 on July 24, alongside a patch making all mutations available at all times.