See also:
Best VGM 223 - http://www.youtube.com/watch?v=3cIi2PEagmg
Best VGM 1111 - http://www.youtube.com/watch?v=J323aFuwx64

A collection of my favorite videogame music. Note that most of them are from games I played so I might miss some great ones from games I never played.

NES
Super Mario Bros 3 (1990)
Overworld (Main Theme)
Koji Kondo