Halloween Kills soundtrack featured 20-tracks, mostly consisting of John, Cody and Davies' score, and was led by three singles: "Unkillable", "Rampage" and "Michael's Legend".

[13] A single titled "Hunter's Moon" performed by the Swedish rock band Ghost, was released on September 30; although the track was not featured in the soundtrack, it would play in the film's end credits.

[14][15] Sacred Bones Records released the soundtrack exclusively through ITunes on October 14, 2021,[16] and expanded widely through digital media services, the following day.

[21] Spectrum Culture's Will Pinfold gave 77/100 to the score and wrote "John Carpenter’s soundtrack to the latest Halloween movie is all that one would expect – entirely predictable, but it nevertheless effortlessly rises above mere pastiche.

"[23] Heather Phares of Allmusic wrote "It all goes to show that Carpenter's knack for composing scores that are entertaining in their own right is alive and well, and just as engrossing nearly half a century after the first Halloween slashed its way onto the silver screen.

"[24] Hanna Collins of Buzz Magazine, gave 3/5 to the album and wrote "Part of the umpteenth attempt to reboot the slow-walking series, Kills’ music keeps it in the family: Carpenter is joined by son Cody and godson Daniel Davies.

Not something to kick back and relax with – unless you’re Michael Myers – but full of the thrills and chills you’d want to wile away a cold, dark night from an artist who remains at the peak of his craft, 40 years on.

The impact simply isn't there, most cues neglecting to generate even moderate doses of dread, and only the most avid franchise enthusiasts will appreciate the continued variations on the main theme and its rhythm [...] None of these modes of presentation will convince you that anything's new or scary in this sequel, however, the music and its creator potentially running out of inspiration even if the body count mercilessly continues to climb.