I thought of that too... Plus, there is even a same puzzle in it. When you need to get inside the summer house inside the Walles castle and put a piece of paper under the door so the key on the other side drops and you can get it. This is the same puzzle when you need to access one of the locked doors in Phantasmagoria and have to put a newspaper underneath it to get the key on the other side.
But, even more so than Phantasmagoria, I think Black Mirror gives me Broken Sword vibes with all of these ancient tombs and traps you need to go thru in order to reach for the ancient keys. So, I would say they were also inspired by that franchise as well.
Post edited January 08, 2022 by gestalten