FM synth that absolutely rips from the first note. Uchuu Senkan Gomora, or Bio-Ship Paladin if you played the localized version, is a 1990 arcade shmup by UPL with music by Yoshio Nagashima. The "Ruins" theme has this driving FM bass line that sounds massive for arcade hardware, and the arranged version on this soundtrack opens it up even further.
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"Field" keeps things tense with these quick arpeggiated runs over a pulsing beat. Only a handful of stage tracks but each one cycles through the game multiple times, so they had to be good. And they are. If you're into early 90s arcade FM sound and want something beyond the usual Capcom and Konami picks, start here.