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 space ship U.S.S. Sephora seventeen weeks after the distress call by Hicks was sent out. The single-player campaign consists of eleven missions. Gameplay is centered around shooting opponents and sometimes items in the environment require interaction to open doors and such to progress. Some of the included weapons are a pulse rifle, shotgun, pistol, RPG, flamethrower and smartgun. Sentry turrets can be set up to defend specific areas. The turrets, along with the flamethrower and the smartgun, are not permanently available but are reserved for specific sections. There is no limitation on the amount of weapons that can be carried at a single moment. There is a motion tracker to scan movement in areas 180 degrees in front of the character. Ammo and armour upgrades can be picked up along the way. A flashlight is used to illuminate dark environments and a welder is available to cut open doors. In additional there is an leveling/experience system unified for both single-player and multiplayer where the earned points can be used to unlock new attachments and aesthetic enhancements for weapons and the main character. Most of the missions are not played alone. There is a squad of AI-controlled team mates who assist. They act independently and their behaviour cannot be influenced by the player. Many missions take place inside the space ship, but also often outside. There are a few stealth segments where all weapons are removed and no sound can be made while walking through a large amount of aliens.
| Boxed A | Factory Sealed Product |
| Boxed B | Product Boxed & Complete with Manual |
| Boxed C | Product Boxed without Manual |
| D | Loose Item |
