_Call of Duty: Black Ops – First Strike_ is a commercial DLC for Call of
Duty: Black Ops. It adds four new multiplayer and one new zombie map:

* Berlin Wall (takes place at Checkpoint Charlie. Is a battle between East and West Berlin)
* Discovery (an antarctic German research station, abandoned from World War II)
* Kowloon (a rooftop map Inspired from the single-player campaign based off of Kowloon city in China)
* Stadium (a hockey rink in northeastern United States)
* Ascension (the zombie map; takes place in an abandoned Soviet Cosmodrome)