Aliens: Colonial Marines is a first-person shooter based on the Aliens franchise and a sequel to the 1986 film Aliens, the second film in the series. The events take place directly after those of the film. The player takes control of the United States Colonial Marine Christopher Winter who is part of a search and rescue team that has to investigate the space ship U.S.S. Sulaco and what remains of Hadley’s Hope to find out what has happened to Ellen Ripley, Dwayne Hicks and the rest of the team that was sent to Acheron (LV-426), a fictional location as one of the three moons of Calpamos, located in the Zeta II Reticuli system. The team arrives on the spaceship U.S.S. Sephora seventeen weeks after the distress call by Hicks was sent out.