Popeye

Super Mario 64 Disk Version is a prototype disk that was created for display at Nintendo’s Shoshinkai show in 1996, to help promote the 64DD add-on, but never received a general release. The game itself is only slightly different to the cartridge version that had been released in Japan some months prior, with an altered castle theme, the omission of the famous 3D Mario head and a couple of game-breaking bugs in Tiny Huge Land.

After the success of Star Fox, Nintendo decided to make a sequel on the same system. However, with the release of the Nintendo 64 looming close, Nintendo decided to cancel the game despite it being nearly complete. Many features of this game were later reused in Star Fox 64, most notably Star Wolf, and the game itself was later leaked as source code and compiled into a working ROM. The game was later released for the SNES Classic console as an unlockable game, marking its first official release. Since then, the game was also released for the Nintendo Switch Online service.

If you can break through 8 levels of treacherous arctic ice, you'll reach the top of the mountain! But watch out. The Nitpickers, Condors, and Polar Bears don't want you up there. And they've got a bag of tricks that will test every ounce of your strength and courage. Are you going to let them stop you? No way! There are 32 mountains to choose from and endless thrills as you fight these arctic creatures alone or with a friend, and ascend to the top of the mountain in Ice Climber!

Super Donkey is an unreleased platformer starring an unnamed proto-Rayman-like aviator/explorer who resembles the main character of Nintendo's earlier game Sky Skipper. Two builds were found, though neither one has any sound or music and the onscreen timer is non-functional in both. Judging by the name and some unused sprites, this might have been a Donkey Kong-related project. Various elements of Super Donkey would eventually be used in Super Mario World 2: Yoshi's Island.

Originally designed for the Sega Genesis, then the 32x, and finally the Saturn, Sonic X-treme was meant to be the first fully realized 3D Sonic title. It was eventually cancelled in 1997 after spending a year in development hell.

Super Shadow of the Beast was going to be an enhanced port of the action-platform Amiga game Shadow of the Beast by Psygnosis. It was never officially released.

Dragon King: The Fighting Game was an unfinished low budget 3D fighting game, and was the first in a planned series of fighting video games. The game was developed for the Nintendo 64, where it was to make unique use of the joystick on the controller. After deciding to use Nintendo characters to give it a more proper atmosphere on the Nintendo 64, the game later became Super Smash Bros. In 2022, Masahiro Sakurai presented in his own YouTube Channel some footage of the game, with the official title localization of "Dragon King: The Fighting Game".

Donkey Kong Plus was an updated version of the Game Boy Donkey Kong. The only known difference between the original and Plus, aside from the graphics, was the addition of a level designer to be used through the Nintendo GameCube for players to create their own levels with. However, the game vanished the following year, and was replaced by Mario vs. Donkey Kong, with the level editor gone and the graphics replaced with pre-rendered graphics. However, the game's sequel, Mario vs. Donkey Kong 2: March of the Minis had this feature and took advantage of Wi-Fi Connection.