I tried to play through this, but got stuck at the part with the shadow man roaming around. There doesn't seem to be any viable way of getting around him and progressing through the game. Not sure if it's bugged or just nearly impossible to do, but there's no way to run and no way of hiding from him once I get past a certain part of the room, and the second he spots me he sprints full speed and catches me. I spent about 20 minutes trying all the approaches I could think of (following behind him, hiding in the area of the room with the two doors, crouch walking, trying to time my movements when he was far away, etc.) but got nowhere. I even tried going towards that staircase with the flickering light across from the metal storage shelves, and it wouldn't let me through. I really like the game so far, but it doesn't seem possible to go through the door he came in from and move on to the next segment.