"Soviet forces have infiltrated a highly classified U.S. facility"
— Map description
Hangar 18 was released as part of the AnnihilationMap Pack for Call of Duty: Black Ops on June 28, 2011 for Xbox 360, and July 28, 2011 for PS3 and PC. It was originally a canceled map named Area 51. This is a medium sized map, set within Area 51. It has numerous easter eggs, such as alien corpses and a floating apple.
Hangar 18 also has many high elevated areas such as a cremation room, towers, and an SR-71 Blackbird.