chunk: In 2379, two hundred years after the events of Alien 3, military scientists on the space vessel USM Auriga create a clone of Ellen Ripley using DNA from blood samples taken before her death. The Alien queen's DNA was mixed in with Ripley's, and the clone grows up with an embryo inside it. The scientists extract the embryo, raise it and collect its eggs. The Ripley clone is kept alive for further study. As a result of the alien's DNA inside her, she develops enhanced strength and reflexes, has acidic blood and a psychic link with the Aliens. Also, the alien's genetic memory allows the clone to have some of Ripley's memories.
  A group of mercenaries, Elgyn, Johner, Christie, Vriess, Hillard and Call, arrive at Auriga on their ship Betty. They deliver several kidnapped humans in stasis. The military scientists use the humans as hosts for the Aliens, raising several adult Aliens for study.