Sierra Entertainment today announced the development of a PSP game based on the new Aliens/Predator film, which Twentieth Century Fox plans to release nationwide on December 25. Designed solely for the PSP System, players will become the ultimate Predator, hunting down and eliminating the Alien species in the authentic universe of the Aliens/Predator movie. The game is being developed by Rebellion, creator of the original highly acclaimed Aliens vs. Predator PC game.