From Wikipedia, Alien vs. Predator is a beat 'em up video game developed and released by Capcom for the CPS-2 arcade game system in 1994. In the game, the players take control of up to three human and Predator characters in a battle against the Alien hordes and rogue human soldiers. The game was very well received by fans and media publications, becoming a classic title for many fans of the beat 'em up genre, but was never ported to any home system. http://en.wikipedia.org/wiki/Alien_vs._Predator_(arcade_game)