Traditional Japanese instruments crashing into heavy rock like two waves meeting. GetsuFumaDen: Undying Moon revived a Famicom-era Konami title in 2022 with that gorgeous ukiyo-e art style, and the soundtrack matches it completely.
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"Drum of the Bonfire of Bones" is exactly as intense as that title promises, all pounding taiko and distorted strings. "Fury of the Sunken God" brings the ocean boss fight energy with layered shamisen and percussion that refuses to let you breathe.
Then "Black Market Boutique" just... chills out. Shop music doing shop music things between all the hell-diving. "Feline Fracas" is a cat fight theme and it goes way harder than any cat fight theme has a right to. The whole soundtrack walks this line between reverence for Japanese folklore and modern roguelite intensity.
If you like your action soundtracks soaked in mythology and distortion, this one earns every second.