Aliens Versus Predator 2 is a science fiction first-person shooter video game developed by Monolith Productions and co-published by Fox Interactive and Sierra On-Line for Microsoft Windows in October 2001 and for Mac OS X in July 2003. The game is a sequel to Aliens Versus Predator (1999); both games are based on the characters of the Alien and Predator media franchises as well as the Alien vs. Predator crossover series. It is set on the fictional planet LV-1201 which houses a vast series of ruins infested with Aliens that is routinely visited by a clan of Predators who hunt the creatures for sport.