Kobold and Gnoll are dungeon synth projects from the label Heimat Der Katastrophre which aim to provide OSR-themed music - and the cassettes come with little dungeons! I can’t speak to the quality of the dungeons, as I don’t own a cassette player, but listening to the music digitally has brought me much inspiration, and the song titles are always very evocative - it feels a lot like being in a very immersive early '90s CRPG.
And come on, that cover art.
My favorite Kobold album: https://www.youtube.com/watch?v=fMXU9OOCT9c&t=1493s
The Heimat Der Katastrophe BandCamp page: https://heimatderkatastrophe.bandcamp.com/music