Light Years (album), by Stellardrone
10 track album
Pay what you want, creative commons licensed. Use for your open source space game ;)
YouTube version: https://youtu.be/NDJn0SQehb4
creative commons licensed.
Huh, that's a little different! Also has a nice sound to it from what I've listened to so far.
I have bought maybe a thousand albums in this genre, and Stellardrone is the only CC licensed stuff in there, unless I've overlooked something. Some other artists do "pay what you want" but still use classic copyright.