Mario Paint had 3 "games" and an add-on released on the 64DD. There were plans to release more. Then the system was canceled. As previously mentioned, Ura Zelda remains the holy grail of unreleased games and people keep searching for that "blue disc" for the 64DD that might have a playable version of Ura Zelda. Games in development for the 64DD were printed onto blue discs. There's an international effort right now to find and archive as many blue discs as can be had in hopes of finding Ura Zelda. Well, they haven't found Ura Zelda yet, but they've found one of the unreleased Mario Paint games.