The way this score handles time periods is so smart. The Centennial Case spans three Japanese eras and the composer wrote era-specific versions of the same themes, so you get Taisho, Showa, and Reiwa variations of tracks like "Flowing Time" and "Enigma."
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Same melody, completely different instrumentation and mood. "Theme of the Shijima" carries this weight of generational mystery, strings building over a piano figure that keeps circling. "Drifting Fruit" exists in three versions too, vocal and instrumental, and the English version hits different from the Japanese.
The mystery-solving cues like "Inference" and "New clues" have that satisfying click of deduction. If you're into FMV mystery games, this soundtrack rewards close listening across all its versions.