...So would this be a memetic object that you encounter (kind of like SCP-012) but with the occasional addition of other entities wearing the mask?

This idea must take a lot of pre thinking before any actual guarantee of its release.

All Right, the simple answer is: Walk all the way to floor 160, and you will get to a dead end. Afterwards, you will get trapped and the Red Mist monster will kill you. You Know when you beat the game if a message box (an error pop up box) appears after the game exits and says something like "No" or...