I love chiptunes; some of these old games have some extremely impressive music considering what kind of sound processing hardware they had to work with.
Some of my favorite chiptune soundtracks are the music from the game boy version of the NES game Bionic Commando, the music from the old Mega Man titles and especially the music from Teenage Mutant Ninja Turtles 2. As a friend of mine just mentioned, anyone who tries to do a rock cover of the TMNT2 themes would likely break their fingers.
A lot of Game Boy (original) games have great music superior to what was heard on the NES, but the NES titles can be great, too.








