Nintendo 64 Disk Drive (partially found unreleased video games for Nintendo 64 add-on; late 1990s-early 2000s)
The Nintendo 64DD was a failed disk drive add-on for the Nintendo 64. Its failure was mostly because it was more expensive than alternatives, such as the Xbox or the PlayStation. There were multiple games planned for the 64DD before its failure caused their cancellation.
Cabbage was the codename of an unfinished game that was being developed by Shigesato Itoi, Tsunekazu Ishihara, and Shigeru Miyamoto of Nintendo. The game would have been similar to the at-the-time popular Tamagotchi, where the player would take care of an unspecified creature, even using the N64DD's internal clock to keep the in-game world running even when the system was turned off, meaning the creature could have changed in the player's absence. The creature was also planned to be transferable to a Game Boy to take care of it when not home, and be shared with friends. Cabbage was meant to be revealed and playable at Space World 2000, but this wasn't the case, and it was eventually cancelled.
A simulation RPG where the player had to survive on a desert island. It would have featured many flora and fauna to interact with. The gameplay was supposed to be a mix of platforming, survival, and life simulation. It was even a feature to cultivate the land and raise animals to give rise to a civilization. However, the game was never completed.
Famicom Classics Vol. 1
As can be guessed by the title, Famicom Classics Vol. 1 was going to be a collection of Famicom/NES games. A second volume was never planned.
Was originally going to be the sixth game in the Fire Emblem series, was reworked into Fire Emblem: Sword of Seals for the Game Boy Advance.
Gendai Dai-Senryaku: Ultimate War
Revealed at Space World 1999, it was being developed by SETA Corporation as a turn-based strategy game, very similar to Nintendo's Wars series, but with a realistic setting. This game would have supported 4-player online battles using the N64DD's Randnet service. The game was delayed multiple times, and eventually changed format to cartridge. The change in format led to the removal of the online mode, and ultimately, Ultimate War was cancelled altogether.
Emperor Of The Jungle
To be based on the famous manga series known in English as Jungle Emperor Leo or Kimba the Lion. It was being developed by Shigeru Miyamoto, and the son of the manga's author, Makato Tezuka. Revealed in Space World 1997, the game would have been an action-adventure game, with vast exploration. However Makato Tezuka was very inexperienced with video games, among other problems with development. The game was quietly cancelled.
The Mario Artist series is similar to Mario Paint paint for the SFC/SNES, with painting and music games. Four games were released in the series, but there are four more that were not released. They are Mario Artist: Game Maker, Mario Artist: Graphical Message Maker, Mario Artist: Sound Maker, and Mario Artist: Video Jockey Maker.
The sequel to the 1994 SFC/SNES game Mother 2/Earthbound was originally in development for the Super Famicom, but later moved to the 64DD as a 3D RPG game. After the failure of the 64DD, development moved to a cartridge format, where it was soon cancelled in 2000 due to the developer's lack of experience in making 3D games. Mother 3 was eventually reworked to be released on the Game Boy Advance.
Arcade-style racing game that was being developed in 1996-1997 by SETA Corporation, it was announced as an earlier title for the N64 in general. It was delayed multiple times and eventually downgraded to cartridge format, when it was canned.
Was supposed to be a remake of the original SimCopter for PC. It's unknown if this remake was going to be significantly different from the PC original, but according to IGN, the game was officially cancelled in 1999.
Super Mario 64 2
An attempted sequel to Super Mario 64, not much is known about it other than it would have included Mario's brother Luigi in a multiplayer mode, and a rideable Yoshi. It can be assumed that gameplay elements of this unfinished game were programmed into Super Mario 64 DS.