The game is confirmed to have single and co-op modes, as well as offer competitive multiplayer options. The single player mode starts with gamers boarding the supposedly abandoned U.S.S. Sulaco to find out what's happened to the crew, before discovering that they've unsurprisingly walked into a trap.
President of Gearbox Randy Pitchford said, "I am thrilled to announce the definitive launch date for Aliens: Colonial Marines. Aliens: Colonial Marines is the culmination of a life-time of inspiration from the films and relentless passion and drive from the exceptionally talented development team behind the scenes.”
Source: IGN