Why horror?

[Mina Darsh]

I'd say one of the few non-scary stories that could be done easily would simply be a mystery/detective kind of story, in... You guessed it, a Mansion or Castle, or both. One would need to purely rely on puzzles and atmosphere to keep it interesting though, which is pretty much Amnesia, without scary monsters and shock events. Kind of a Amnesia Light edition. :|