Via Hidden Track, I'm learning all about 8 bit artists who create music using the sound chips from old Nintendos and Commodore 64. While some use the actual chips and others have emulators that work with computer composition software, all of it sounds like Artist X doing the music for Galaga, like this one here of Black Sabbath's 'Paranoid'.
8-bit Collective is a community site that is absolutely worth wasting the rest of your work day on going through all the hundreds of artists making electronic music the old fashioned way.
This dub reggae tune by Oiki is my favorite so far.