@nprofile1q... hyperrogue, mindustry and luanti(minetest) are libre by the way. Mindustry also has cool original soundtracks

https://media.freesoftwareextremist.com/media/be/8d/bb/be8dbba4c99d258ae0b81a538c7b022fd2354f51941019a1cf04a25f86e04a9e.oga
https://media.freesoftwareextremist.com/media/60/04/2a/60042a56508d792bf907457922fa0e2678e171d0309e31e2ab301314ab72c82f.oga