This is Custom Stories made for The Amnesia Mod.
The Amnesia Mod is a mod that lets you creates map with custom horror stuff like doors, windows, scary monsters, and all those stuff has nice ambient to it.
Creator: FLUFFY2
Client Version: 1.7 and above
In my opinion the ambient is more of horror/scary and mystery type.
https://youtu.be/O1wkhMk45Ys
So this map is a demo map so you could test out various mechanics works in the 1.1.1 version.
However, even though this is just a demo it’s worth to play and make it as a learning step and gives idea to create your own scary/horror map.
Of course to play Custom Stories you need The Amnesia mod installed first.