The Alien, the perfect organism. A killing machine whose physical excellence is matched only by its hostility. Officer Ellen Ripley and the crew of the starship Nostromo encountered one suck creature. Years later Ripley has been rescued, only to discover the planet where her nightmare began has been colonized. When communication is lost with the settlers, a team of battle hardened space marines and Ripley are sent in. What awaits them is not one creature but thousands.