Crunchy FM synthesis with that unmistakable MSX2 character. Hydefos put out this soundtrack in 2008, built on MSX2 hardware, and it sounds like it. "HYPER DEFENDING FORCE" opens with classic FM chip energy, all sharp waveforms and rapid arpeggios.
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"AREA-1" drops you into the action with tight, driving melodic lines. "METAL CREATURE-A" is a boss theme that squeezes every bit of intensity out of the FM sound source. There's a rawness to the timbres that digital audio can't replicate.
"VISUAL THEME OF STACY" brings something more atmospheric as a break. The whole OST cycles through areas and bosses like a classic shoot-em-up should. Each area theme builds while the creature themes punch harder. If you love FM synthesis pushed to its limits, this is the good stuff.