Pretty sure these two count:
Was debating this one because Void Stranger's music is so integral to its experience and it feels like a spoiler just to post it, but Void Symphony does this twice without you even realizing it while you're playing:

Your friendly California Bay Area artist making anime-style art with the sleek, modern veneer of the year 19XX.
Forever a friend of Eggbug.
Pretty sure these two count:
Was debating this one because Void Stranger's music is so integral to its experience and it feels like a spoiler just to post it, but Void Symphony does this twice without you even realizing it while you're playing:
This is probably the biggest example I know of this: Into Free from Dragon's Dogma (but not Dragon's Dogma: Dark Arisen!)
you see Tim Follin and you know you're not getting generic video'd games theme