Dark, moody orchestral meets Korean folklore horror. 8Doors: Arum's Afterlife Adventure is a metroidvania that drags you through the afterlife, and the music makes sure you feel every circle of it. "Slothful Forest" has this creeping, heavy atmosphere that just sits on your chest.
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"Mines of Greed" picks up with more aggressive percussion and tension, like the walls are closing in. Then "Death Tavern" shows up in two versions, one almost calm and the other way more sinister, which is a great trick for a hub area.
Three versions of "Belief" near the end. The soundtrack building to something and then reframing it over and over. Put this on if you want afterlife-themed platformer music that actually commits to being unsettling.