Lt. Henry and his crew of ne'er-do-wells are -- to put it simply -- in the soup. Stranded in a space station with a pack of bloodthirsty Aliens waiting behind every access hatch, this platoon of Colonial Marines will leave no shell unfired in their struggle to survive. And as the pulse-fire echoes through the corridors, a hideous plan of mutating humans into Aliens is uncovered, leading Lt. Henry to wonder if this is more than just a random infestation.