Not sure it strictly counts as Grand Strategy as it’s more of a sandbox, but X4 might be up your alley on the sci-fi front. Build a galaxy spanning empire from a single ship; complete missions, mine, trade, explore. You -can- fly the ships, but you don’t have to. You can just sit in a station issuing orders.
Same artist who did the music for TUNIC. While its soundtrack isn’t great to listen to alone in my opinion, it is phenomenal in game. To the point where watching the trailer gives me goosebumps.
Also, I emailed the artist once to ask permission to use the Dustforce soundtrack in a YouTube video I was making. They gave me permission and I sent the video to them when it was posted and they said very nice things about it.
Stellaris has a fine soundtrack, but I found myself vibing way more playing it with FlyByNo’s soundtrack for Endless Space. Endless Space didn’t have the staying power with me that Stellaris did but that soundtrack is * chef’s kiss * .
Persona 3/4/5 (not all tracks are instrumentals, but most of them are and they are straight bangers)
Katana Zero
Danganronpa 1, 2, V3
Silent Hill 1, 2, 3 (all I can vouch for, but I hear the later games still have banging soundtracks)
Crosscode
Kingdom Hearts 1/2
Nier Automata
Minecraft
Donkey Kong Country 1/2
VA-11 HALL-A
Catherine Full Body
Deadbolt
Risk of Rain 1/2
Some of these you'd have to sift through, like Silent Hill is one part industrial creepy noise, and one part absolutely incredible hip hop and rock
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