Okay, so I don't play much Minecraft and I have a feeling that alot of the people here might hate it or something, but holy christ, the soundtrack, created by C418, is just fantastic.
Volume Alpha: https://c418.bandcamp.com/album/minecraft-volume-alpha
Volume Beta: https://c418.bandcamp.com/album/minecraft-volume-beta
There's also the soundtracks to Super Meat Boy and Binding of Isaac, by Danny Baranowsky.
SMB: https://dbsoundworks.bandcamp.com/album/super-meat-boy-digital-special-edition-soundtrack
BoI: https://dbsoundworks.bandcamp.com/album/the-binding-of-isaac-2
And then there's also the soundtrack to Super Hexagon, by Chipzel.
http://chipzel.co.uk/album/super-hexagon-ep