We know this dude who lives around here and writes music for PS2, GBA, GBC, etc. games and three years ago he wrote a bunch of chiptunes in the styles of certain games (chiptunes are songs made within the limitations of 8-bit consoles with the same synths and all).
http://virt.vgmix.com/index.php?page=chip
He also started and runs vgmix. Listen to Shell Shock, it will rock your fucking balls off.