Call of Duty: Advanced Warfare was the firts game in the franchise developed by Sledgehammer Games. it is out now on Xbox 360, Xbox One, PS3, PS4, and PC.
Call of Duty: Advanced Warfare has a map in the multiplayer mode, Atlas Gorge, which is a remake of the popular Pipeline map from the 2007 hit Call of Duty 4: Modern Warfare.
This change is available on all platforms- meaning Xbox 360, Xbox One, PS3, PS4, and PC players alike should be able to play on the new map for free.
Maybe it has something to do with trying to create awareness for Call of Duty: Modern Warfare Remastered, which is due out later this year?