Ahead of PAX 2011, Sega has released a fine looking debut trailer for Aliens: Colonial Marines. Distancing itself from such games as Aliens vs. Predator, Aliens: Colonial Marines captures James Cameron’s 1986 ‘Aliens sci-fi classic. In the game, you join up with a squadron of Marines as they invade an alien-infested planet, wiping out everything they see while they attempt to survive. The hard bit is staying alive, and as you can see in the footage, that doesn’t seem to be easy! Going by the trailer this looks to be one intense, atmospheric gaming experience. The game is set for release in the spring of 2012.