Maybe you were a worker on Gateway, this time zone took place while the crew on the Nostronomo was getting killed, for your training mission. After training level you pilot a ship out of Gateway, about 24 hours later you see the Nostronomo shuttle. Then after going on the shuttle and doing whatever, you go back to you ship and go into Cryo sleep, you happen to crash on LV:426, and a rescue team gets you to Hadleys Hope..57 years after you got into the cryo tube. After you do whatever your doing on Hadles hope (After Aliens attack), you get off the planet, but are blamed for the deaths of all the colonists. You then go to Fury 161 and are one of the prisoners there, you do this and that and help kill the runner, sneak on board the Weyland rescue ship, and snoop around there, then you find an escape pod, and blast yourself away from the ship. Of course, you get into a cryo tube, and 200 years later, the Auriga opicks you up, you survive the ship of aliens, then sneak onboard the Betty, and get to earth. Game over.