Aliens versus Predator 2 is a science fiction first-person shooter computer game developed by Monolith Productions. It was published by Sierra Entertainment, and released through Fox Interactive for PC and Apple Macintosh computers in 2001. It is a sequel to the 1999 game Aliens versus Predator; both games are based on the characters of the Alien and Predator media franchises as well as the Alien vs. Predator crossover series.
Aliens versus Predator 2 has several multiplayer modes which can be played through an internet or Local Area Network connection. In each game the player chooses one of four teams to play as: The Aliens, Predators, Marines, or corporate mercenaries (called "Iron Bears" in the game's storyline). Each team has unique abilities, advantages, and disadvantages. The Aliens are able to scale walls and ceilings and the Predators can become invisible, while the two human teams have a large array of heavy weapons as well as motion trackers.