B-60 will rush to the current room and sink into the floor after 5 seconds of lingering. B-100 will spawn via the next door sign being ‘Redacted,’ ‘Prohibited,’ ‘Unauthorized,’ etc.. It will break down the door with said sign and release a bunch of odd goop all over the walls, then leave after 15 seconds. Touch the goop while it’s not despawning, and you’re dead. B-120 will spawn via the paintings on EVERY room going dark, and will kick you out of hiding spots until it despawns.