If your game still needs atmosphere, here are 16 procedurally synthesized horror sounds, WAV 48 kHz + OGG: 2 seamless 10-second ambience loops (haunted house, graveyard), door creaks and slams, chains, footsteps on wood and stone, a stinger, jumpscare, heartbeat, whisper, bone-knock and iron-bell UI, a growl, and a cauldron bubble.

No samples, no generative AI audio. Commercial licence included, use them in a game you sell, just don't resell the sounds themselves.

Free lite: https://breakasunder.gumroad.com/l/halloween-horror-lite

Full pack, 80 sounds, $9: https://breakasunder.gumroad.com/l/halloween-horror-sfx

Good luck with the jam.