Finally i got around to doing this.
Undertale the locked door in.
Undertale is about a child who falls into an underworld filled with monsters.
That key will open the back door.
If you are defeated by papyrus instead of seeing a game over screen papyrus will capture you and lock you in the guest room.
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.
It s not actually locked though and the bars are too wide to stop you from leaving.
After that you go into sans room and will find another key on a box.
Don t worry though he gives you a nice bed and some food.
Anyone that s started up undertale for the first time will encounter a mysterious locked door early in the game s snowdin area.
We re an unofficial community of fans and a showcase for undertale fanwork.
By the way there s two other keys that you might want to check out if you already haven t.
Come join the fun.
To do that you have to save just before he judges you and then reload several times until he gives you the key.
To open this door you must dodge every name during the special thanks portion of the credits after a pacifist run.
In the nintendo switch version examining the door leading to mad mew mew in the dog shrine before it is unlocked yields a message saying that the door is locked by a mysterious seal as an ominous piano jingle is heard.
Repeat a few times to get a key to his room.
Nothing will open it not even the expensive mystery key item.
Undertale by indie developer toby fox is a video game for pc ps4 vita and switch.
There is no other way to enter this building.
First you have to get the key to sans room.
Then snoop around there to find an another key that unlocks a hidden door behind the house.