Scary, mentally questionable, horrific and gruesome terrors of fright and dread? Sounds fun.
Is the setting original, or did you draw inspiration from any one, or multiple, source(s)?
Whatever the case, just like Skys, I've been wanting to do something like this for a long time - but never found anyone who could cater to my taste. So, count me in! :)

Just hope you have some plan to deal with potential meta-gaming players...