Late-80s arcade FM synth doing samurai music and it goes way harder than it should. Saigo no Nindou dropped in 1988 and the sound hardware is working overtime to sell that feudal Japan setting. "THEME FROM BUTSUZO" has this driving pulse with these sharp FM stabs that sound almost like shamisen if you squint.
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"KESSEN" for the boss fights cranks the tempo and layers in these frantic arpeggios. Then "KIZASHI PART II" in the final stage does something genuinely tense, building this urgency that the earlier tracks only hinted at.
The game over theme "MUNEN" hits with this defeated tone that. Yeah. If you dig arcade soundtracks from the FM era, this one's worth tracking down.