One of the dumbest elements of Aliens: Colonial Marines was the sudden appearance of Corporal Hicks, a move that undid the canon of the movies for no real reason other than the desperate need for a recognizable character.
Hicks handwaved his nonsensical appearance with "that's another story," which I figured at the time was an excuse to sell us an explanation separately at a later date. Well, what do you know? Stasis Interrupted, a quietly released downloadable chapter, indeed sells us an explanation as to why Hicks appears in Colonial Marines when he was supposed to be hurtling toward his sleepy death.
It'll cost you $10, or will automatically be obtainable by any poor soul who stumped up the green for a season pass.
Alternatively, you could leave a container of fish and eggs behind a radiator for five days, eat the mulched contents, then bounce naked on a trampoline in a white room while the stomach poisoning sprays a steady stream of liquid shit all over the walls, and the resulting stains will likely tell a more respectful and cohesive Aliens story.