Every room in Rogetsu Hall has its own moon and its own dread. Tsukihamiya Senkyokushuu is the Fatal Frame / Project Zero soundtrack collection for Switch, and it maps the entire haunted inn through sound. Return to Rogetsu Isle on the title screen sets this suffocating tone immediately.
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Each numbered room theme shifts the atmosphere just enough that you feel like you're walking through the halls. Harmonious Moon in the entrance is unsettling in this quiet way, then Sacred Moon for Madoka Tsukimori gets more overtly threatening.
The character themes hit hard too. Silent Moon for Ruka Minazuki is genuinely chilling. That slow creep through numbered rooms, each one worse than the last. If you've played any Fatal Frame game, you already know this kind of sound design is half the horror.