In one of the rooms in the halls of the lost there are two levers on the walls that make water flow into a hole. Is that supposed to open a secret room somewhere or did I miss something?
I had pulled both levers the first times I played in easy and normal mode and never noticed the door until I returned after completing the game in normal mode. When I played it in hard mode, I made sure I turned around after pulling the levers.
When I played it in hard mode, I made sure I turned around after pulling the levers. 
Linear Mode
