A phobia is a fear of X thing, for example trypophobia is the easiest example to understand. Play with a phobia that you can use in a horror game, and also focus on Japanese folklore that often makes use of them.
I'm sorry but if your game triggers trypophobia I'm outta there
Don't use that phobia please! ha ha ha
Oh no Sorry in advanced! Taking some inspo from Junji Ito on my art
HAHAHAJA