A sound drama. This isn't really a game soundtrack in the traditional sense. Shikigami no Shiro's Dairoku Sekai Eiyuu Roku is a full audio drama from 2002 that expands the lore of the original arcade shooter through voiced scenes and background music.
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The tracks are named after story beats like character arrivals and investigation scenes, and the music underneath shifts between lighthearted comedy bits and genuine dramatic tension. "拙者はロジャー・サスケ!" has this goofy theatrical energy while "沈みなさい、あしきゆめ" pulls back into something darker and more climactic.
"夜明け" closes on a hopeful note. If you're deep into the Shikigami franchise and want the expanded universe stuff, this is a fascinating piece of it.