found unused "madness" sounds in files. this is similar to what I want to suggest. scare, with corpses, dismemberment and harsh sounds, say, in a direct way. but you can scare in the Silent Hill style. if the character goes crazy: 1) let him hear someone knocking or breaking on the door. Even a simple sound when you turn the knob will strain you. 2) let him hear someone walking or running near his hideout. Someone is courting the house ... of course, no one will be there, but it gets on your nerves. 3) there are phone booths in the game, let the bell be heard. you can even pick up the phone and they will say terrible things to you. make us afraid in the future not with screamers, but in more graceful ways. Get into our brain.