I have the harbour elevator gate key, and I opened the door.
However I still can't walk through, there is an invisible wall there.

It seems to me that there are possibly multiple keys named "footlocker keys" and they are consumed when you use them. This is confusing. As far as I can tell, this is the only type of key that behaves this way in the game, and I spent a while trying to figure out why my "footlocker ke...