Aliens: Colonial Marines

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 addition, there is a 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.

Opponents include famous xenomorph aliens from the first three films, such as the chestburster, drone, facehugger, queen, warrior and runner. There are also new types, such as a boiler that can explode and a crusher. Certain levels include encounters with human soldiers from the Weyland-Yutani corporation with a different interest in the colony. There are also a number of boss fights.