Masahiko Takaki wrote maybe five real tracks for this 1988 Taito maze-chaser and every single one goes unreasonably hard. Raimais runs on the YM2610 FM chip, and Takaki pushes it like he's scoring an action film with nothing but frequency modulation.
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"Theme #1" is the centerpiece, this driving bassline under bright FM leads that burrows into your head and stays there for days. "Theme of Huge Mecha" shifts into something heavier and more menacing, all growling low-end synth.
The unused title music is fascinating too, a glimpse at a different direction entirely. Short tracklist, zero filler. If you think late-80s arcade FM synthesis peaked with Sega, Taito would like a word.