Left 4 Dead 2's latest DLC has missed it's 24th July release date. Valve headed to their Twitter page to tweet an explanation. Taken from one of their tweets, Valve stated that "We are working with MS on a release schedule. We don't have an ETA yet, but we hope to have it out soon. It will be 560 Microsoft Points."
Entitled "Cold Stream", the DLC includes a brand new campaign, and will also import four of the five campaigns over from Left 4 Dead:-Blood Harvest, Crash Course, Dead Air, and Death Toll. No Mercy had already been ported over in the previous DLC, The Sacrifice.
Steam users will already have access to the new DLC for free. Let's hope it's released on the Xbox 360 soon!