Jeff Bond's liner note describes James Horner's score for Commando as "exchanging the thematic, leitmotif aspect of his symphonic scores for a style that was as single-minded as John Matrix's pursuit of his daughter..."
The core elements of Horner's score for the film are used to great effect in the film's robust and memorable Main Title. Bond lists those elements as "pulsating electronica riffs, crashing Simmons drums, a growl of no-nonsense orchestral menace from low brass, a calypso-like steel drum tune, an undulating, almost breezy saxophone riff and the exotic sound of Japanese shakuhachi flute."
One thing I feel compelled to note, or point out, is that the score's "no-nonsense brass" and "calypso-like steel drum" textures and flourishes sound very much like the brass and steel drum textures and flourishes Horner composed for 1982's 48hrs. Something not at all surprising considering Horner's well known, and self-admitted, habit of reusing his past compositions. That observation is in no way meant to disparage Horner's superlative work here and elsewhere. It was part of his process and good music is good music, period.
The Main Title also contains a brief and gentle melody, played by the orchestra's string instruments, heard during a montage of scenes showing the loving bond between father and daughter. It only appears here and nowhere else in the movie.
What follows the Main Title is some fifty-plus minutes of gnashing and grinding action cues. "Horner's score becomes the musical equivalent of Schwarzenegger's stone face as the movie progresses," Bond observes in his notes. "It is largely unvarying, but it gains power through sheer repetition, reinforcing Matrix's unstoppable determination."