Escalation DLC has been released for PC as of yesterday and I have to say that maps are a real treat. So far I really like Stockpile and Convoy the best tho Zoo and Hotel have nothing to sneeze at either. I have tried the new zombie add on Call of the Dead and while I only made it to wave 4 I had a blast. Quite a change from the norm, well the norm of Zombies that is lol.
It was also announced that Double XP starts at 10 pm PST today as well. Also you can dl the MP part of cod bo and have a go at that as well.
Hope to see you online - steam name: ElkonVryce