So, I know of the Promised Remedy secret dungeon where you have to hang out in front of the potato painting for a while, but I think there's also another secret dungeon? I know there's two costumes that don't show up in the hut, and one of them is from the Promised Remedy dungeon, but where is the other one? I thought I had found most of the secrets in the game... guess not, haha.

Solve the puzzles in the game, if you know how to get into the secret dungeon you also know how to solve the other puzzles ;)

I'll post a complete map when I get home.

The map in steam guide community is complete no ?

Look at the comment I made on that guide. I updated his map with correct info

Ok just did it. =)