Aliens vs Predator is an update of the 1999 PC game Aliens Versus Predator, in which the player can choose either Marine, Xenomorph (commonly known as Aliens) or Predator in a first-person shooter. The story takes place on the planet designated BG-386, in a mining colony owned by the Weyland-Yutani Corporation where they have found a mysterious site; an ancient pyramid that depicts an unknown alien race and the Xenomorphs. Curious, they decide to forcibly open the doors and cause a massive energy backlash that causes the power on the entire planet to go out, unleashing hell in the process. This is where the story begins for the three factions.