The portal 2 soundtrack is an absolute banger
Steam
Steam is a video game digital distribution service by Valve.
Steam News | Steam Beta Client news
Useful tools:
SteamDB
SteamCharts
Issue tracker for Linux version of Steam
Hades, hollow knight, ck2
celeste
Don't know your taste but I love the soundtrack to Hardspace: Shipbreaker. I'm not great with genres but it's mostly instrumental folk. It's in that sweet spot where it can serve as ambient or active listening.
Divinity: Original Sin 2 - Has really nice "chill" sound track, sorta old timey
Bastion
Hades
Warhammer 40k: Mechanicus, if you wanna get really wild
The same guy that did Warhammer 40k: Mechanicus also did IXION.
Risk of rain 2, frostpunk.
When you buy Risk of Rain 2, you're buying a soundtrack with a free game alongside it.
Any Supergiant game
Tetris Effect has a great soundtrack
oh yah connected is fire
I love me some Endless Space 2.
Dead Cells has a great soundtrack
Furi, no mans sky, hyper light drifter, doom eternal and sable are my favorites
Probably doesn't count... Streets of Rage 2 (listening to it right now)
The Forest has an awesome soundtrack, but the complete edition is on creator's youtube channel.