In some places the doors have fallen due to possible violent activity or perhaps natural cave shifting.
Undertale locked door in forest.
Glyde can be encountered in this room before fighting papyrus.
The door behind papyrus s house.
The ferryperson mentioned something along the lines of if you go behind someone s house you might be mistaken for trash i decided to spend some time looking and found that you can walk behind papyrus s house and pressing z while back there causes an it s locked message to pop up.
The door which bears the delta rune is surrounded by glowing mushrooms and floating particles.
It can be accessed just before the papyrus boss battle.
The mysterious door is an area found in snowdin forest south of the right side of the room with the icy x s and o s puzzle.
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Feb 16 2016 5 05am showing 1 8 of 8 comments.
The optional mystery door is a locked door in snowdin forest.
A door in a place where sans appears twice on the same screen last edited by sekkuar666.