Here is a small amount of info released by the developers…
Aliens: Colonial Marines begins with an ostensibly abandoned ship, the U.S.S. Sulaco, recovered in orbit around LV-426. Players lead a group of highly trained United States Colonial Marines as they board the deserted craft to uncover the fate of the crew. They will have to fight to survive unspeakable horrors and their own anxieties as they chase down the truth behind a galaxy-spanning deception that places humanity at the mercy of the most murderous and deadly species in the universe. Aliens: Colonial Marines features authentic environments, such as the surface of LV-426 and Hadley’s Hope, weapons inspired by the film series and is designed to
Enlist in the Marine Corps
Bringing you a true sequel to James Cameron’s classic Aliens, get tooled up with classic Marine weapons including pulse rifles, motion trackers and flamethrowers.
The most authentic Aliens experience ever!
Using authentic environments inspired by the film series including Hadley’s Hope, the Sulaco and LV-426, you will be immersed in an eerie, atmospheric world where any moment could bring your death.
Drop-in / Drop-out co-operative gameplay.
The masters of co-op bring their expertise to the Aliens universe. Xenos getting too tough? Call up your buddies so they can drop in with extra firepower. The whole campaign can be played with a squad of up to four players, dropping in and out as necessary through self-contained missions within an over-arching narrative.
Loadouts and upgrades.
Create your perfect killing machine. An extensive upgrade system allows players to customise their characters to play the way they want. Earn experience to get perks, new weapons and new looks for your squad.
And now a video: