Escalation includes four new competitive multiplayer maps alongside the much lofted "Call Of The Dead" zombie stage. The grindhouse-inspired co-operative level includes performances from Sarah Michelle Gellar, Robert Englund, Michael Rooker and Danny Trejo.

To celebrate Activision will be turning on double XP from Friday, June 10th right through to Sunday, June 12th.

There's more information on the PlayStation Blog.