Tinny Game Boy beeps that somehow carry real atmosphere. Heiankyo Alien is a 1990 Game Boy classic where you dig holes to trap aliens in ancient Kyoto, and the soundtrack goes way harder than a puzzle game on that hardware has any right to.
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"Theme Song Of Knight Kebiishi" is the main hook and it gets an arranged version at the end that shows what the composer really heard in their head. "Rock N' Roll In Kyoto" is the track name that tells you these devs had personality.
"Tears Of Eva" brings unexpected emotion through those 4-bit channels. "Kagome Kagome" references the old Japanese children's song, tying the whole feudal setting together. If you want proof that Game Boy composers were doing more with less than anyone in the industry, eight tracks is all it takes.