Oceanic Touhou that sounds like drowning in mythology. Sapphire Panlogism is a 2021 fangame that wraps bullet hell intensity in this deep aquatic atmosphere, and the track names alone tell you it's going somewhere strange.
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"Watatsumi's Wadaiko Deluge" hits with thundering taiko drums layered over surging electronic currents that genuinely feel like a tidal wave rolling in. "The Primadonna's Burnt Wings ~ Walpurgis Nightmare" pivots hard into something darker and almost operatic.
Then "A Drowning Man's Dreamscape ~ Sinking Star" pulls you under with these submerged, distorted melodies fading in and out. The whole soundtrack breathes like the ocean. If you want Touhou that trades shrine maiden energy for deep-sea divine chaos, this one swallows you whole.