Can't leave starter area because no keycard generated?
So this is my first time playing this game. ive managed to go down to the sublevel with 939, and get the nightvision goggles and severed hand. but, the rest of light containment is just one long hallway of rooms, lined with keycard doors, but no keycard in sight. i found the "light testing chamber b" which takes a level one card, but there literally isn't a room with a keycard. my seed is "f9mx25y" if you want to try it. but right now, im completely lost as to how to progress.