Go and get the code for the monitor in the cryopod room. Look around in the map and you'll find a room that says "Enter to open the door" go in there, get the keycard for the maintenance hall, open the maintenance hall door kill an alien you'll find a corpse in there and the corpse has the ventilation room keycard and then go inside and get the medbay keycard

Fight the miniboss look around in the miniboss hangar room get the reactor keycard fight space pirates get the server room keycard fight some more space pirates do the minigame fight another infected that pops up from behind you in the hallway that makes you piss your pants, and than go into the final boss room.

ok thanks

i cannot find it