Artist curates 4 tabletop RPG background music lists in his page, aimed at Starfinder and other sci-fi systems. - eviltoast

Follow his page for accessing all the playlists.

Each one is in the 3-4 hour range and they are:

Ambient Retrowave: you just landed at Gliese IV, an apparently abandoned planetoid which was a penal colony. As you explore the place, you feel that you’re being watched by someone… or something.;

Instrumental Retrowave: enemy fighters breached the outer rim, and all fighters from your brigade are launched to battle. Like a menacing swarm approaching, you see bogeys right and left that you have to engage;

Synthwave Selection: you are in the biggest space station in the quadrant, looking for your undercover contact. You have to find them first, searching in luxurious halls, rusty and half lit corridors, crowded gateways and suspect entertainment places. Bring your own oxygen though.

Eerie Sci Fi: your space freighter was boarded by a ship from unknown origin. You hear the hiss from hatches being opened. Will the newcomers see you as allies or foes… or food;

PS: the playlists are in the bottom of the artist page if you use Spotify mobile.

P.P.S.: if you want to go really dark, try this playlist