If we’re talking obscure…

• Leap Year - the march DLC also has some good music, but I don’t think anybody’s uploaded it.
• Mario & Luigi: Superstar Saga - Teehee Valley - definitely nostalgia speaking, but that game has a whole bunch of good music. It’s all crusty, by virtue of being a GBA game, though.
• Particle Fleet - Perhaps a bit too epic for the gameplay, but I enjoyed it while playing back when it came out, and coming back to it I’m still very much enjoying the tracks.
• Cultist Simulator - Not sure how well-known this one is, but it’s very atmospheric, mysterious, mostly slow
• CrossCode - as an example, Autumn’s Rise - Nice upbeat “overworld” type of track, and I might be a sucker for synths