This album has been getting a ton of buzz. It's a chip NIN Pretty Hate Machine tribute.
http://inversephase.bandcamp.com/album/ ht-machine
This is how a tribute album should be done, not like that awful Radiohead one. He uses 8 different systems: C64, Atari, NES, NES w VRC6, Gameboy, MSX, Master System, Japanese Master System. I know some people on this site gave him some shit for starting a kickstarter for this a while back, but he did license it all correctly.