Come next Thursday, September 13, the Modern Warfare 3 PC and PS3 communities will be able to pick up the "Chaos Pack" multiplayer DLC, also referred to as "Content Collection #3."
The pack has been on Xbox LIVE since early August, since Microsoft's exclusivity deal with Activision still holds. What you'll get with the Chaos Pack are four new Spec Ops missions, three new Face Off maps, and "Chaos Mode" for Spec Ops. ELITE members will automatically have this stuff once it's released, while everyone else will need to fork over the COD standard of $15.
Premium ELITE members on LIVE got the latest and final content pack today, "Final Assault."