I've always found the fact super interesting that there's a ton of games that realistically, barely anyone ever played. The work of writers, composers, who perhaps put their heart into it, all is lost to time, never to have been experienced by more than a few people.
Think about old licensed games for consoles like the GBA or the DS, that feasibly only a few thousand children ever played, let alone completed, or even remember to this day.
As opposed to stories that require you to play a whole game to experience, let's make this a thread for cool obscure video games' music; those tracks that might be super interesting or funky but never really were listened to by more than a few kids who accidentally got gifted the game for Christmas 2007, so to speak.
I'll start with a personal favorite, a game that I own and have even completed as a kid but that is entirely obscure. I have never seen anyone mention or discuss it online despite it being genuinely good. It's the game Mister Slime / Mr Slime Jr depending on region, for NDS.
The soundtrack is particularly dear to my heart because it's apparently varying from the developers beat-boxing a really strange beat to simple low fidelity funk. It's so odd but really nice in its own way. I am glad that some tracks have been uploaded to the net at least so I can share them with you: