Layers of Fear is a game that mixes psychological, mind-bending scares with some well-timed jump scares. It's true horror's power lies is in its ability to trick your senses, and in this sense, the mansion itself comes to life. It actively works against you and at times, it lulls you into a false sense of security -- which it exploits to the fullest as the game goes on.
There are so many ways the house itself acts to deter your senses from the renaissance era paintings' changing expressions and the vanishing doorways. The Mansion could be the most elusive and certainly the most original NPC on this list.