Aliens

The multinational conglomerate Weyland-Yutani Corporation has lost contact with its mining colony, Hadley's Hope, in LV426 Acheron. In response, the Colonial Marine troops of the USS Sulaco decide to send their team to investigate. The marines soon discover that the place is infested by an unknown parasitic alien life form and that the Hadley's Hope crew was either exterminated or used as hosts to breed the creatures' next offspring.