Backers who supported Boss Monster at the Player's Choice level and above were given access to a digital download of a "soundtrack" MP3 for the game.

This ten-minute track features authentic 8-bit music by chiptune artist Lars the Laohu. The first two minutes of the song are a happy, adventurous tune. It then transitions into more foreboding "dungeon" music before concluding with a more intense "boss battle" section.

The soundtrack was released alongside a digital copy of the Boss Monster Strategy Guide.