For RPG Maker folks: a free horror sound kit with OGG files, so you can drop them straight into audio/se (MZ/MV) without converting anything: https://ahustga.itch.io/horror-jam-kit

15 sounds: jump-scare and dread stingers for event triggers, a creak and a knock for doors, a heartbeat for chase scenes, a metal scrape, an eerie music box, and two drones you can use as BGS. WAV is included too.

Royalty-free, for jam and commercial games. Credit is appreciated but not required.

Quick tip: play the riser as an SE about 1–2 seconds before a "Show Picture" scare, then hit the stinger on the frame the picture appears. That makes the scare land much harder than the stinger on its own.

Good luck with your games!