Labyrinth of the Demon King is a first-person survival horror game set in Feudal Japan, featuring a soundscape composed by Remu Daifuku. Daifuku's sound design includes unsettling noises such as gurgles and eerie biwa string solos. He recorded sounds from his old house and the town's bonshō bell to enhance authenticity. A custom daxophone was created using old nokogiri blades to align with the game's historical context. The final sound design was processed through an old tape machine for a gritty texture that complements the game's visuals. The soundtrack is available on YouTube and itch.io, and the game can be found on Steam.