Zombies: AVP is a custom storyline created by HellHoundSlayer. It was inspired by the AVP movies and the Xenopedia. The following maps appear in the storyline:
(And yes, i did get really creative with the mp names.)
It takes place in the same time and universe as CoD Zombies, however, it revolves around 4 US Marines that are sent to investigate caves in Africa and their journey back home. They enter the caves only to find these new creatures: Aliens, Predators and such.