Honestly this RP reminds me of a horror RP concept I made.

Basically players could be one of two things. Exorcist, and Detective. There were multiple types of those too, as well as the concept of on-field and support types (eg. You had a field type detective and support type, as well as a jack of all trades detective).

You dealt with urban mysteries. The horror side came from the fact that as humans, your characters were pretty much in danger in a direct confrontation with even a weakling, and there was also an insanity mechanic. If your sanity got too low, your character had to quit this job, assuming they didn't die or get possessed irreversibly already. It would've been an especially tense moment if players took on a case that seemed harmless enough, but by coincidences and misfortune, led them to a very high level ghost. In that case a player could be eliminated then.

I can't find it anymore, but I might explore that concept again sometime in the future.

I do remember what it was inspired by though, and that was the anime Ghost Hunt.