I have purchased the Season Pass to Black Ops 2. I have downloaded all of the DLC map packs, but I have recently had an issue where the game was not recognizing the Apocalypse DLC Map pack. I have tried deleting and re-downloading the map pack several times, but I have had no luck. I have verified that the DLC has been downloaded and the size of the download matches the description, so I know it is not a partial download. There are no explanation marks on the file, so I do not believe the file is corrupted. I have also cleared the cache on my memory unit with no luck. Because I purchased the Season Pass, I have been downloading the pack from the in-game store, per the Season Pass instruction. The other three map packs are working fine.