Hi Hi Puffy Ami Yumi: Puffy Ami Yumi and the Manga Madman

Splatterworld: Rick to Kyoufu no Daiou is an unreleased sequel of Splatterhouse: Wanpaku Graffiti for the Famicom. A prototype of the game leaked online on 4Chan in October 2025.

Falcon was an unreleased game by Spectrum Holobyte.

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.

Austin Powers: Why Make Millions...? is an unreleased game for the Game Boy Color that was meant to be the fourth game in the series of Austin Powers for the system. Like the other games in the series, it was intended to be a mini game collection. The prototype for the game was discovered in the September 2020 batch of the Nintendo gigaleaks.

Released on Game Boy Advance, by Multimedia Intelligence Transfer.

Congo: The Secret of Zinj is an unreleased game based on the hit 1995 movie. The game was cancelled after a short development turnover and play tests indicating that the game was not good enough for release. Also contributing was the fact that the movie didn't gross as much as expected.

Eat or be eaten! Assume the role of an animal in it's early stages of evolutionary development. As your animal instincts take over, you will boldly traverse hostile environments, savagely stalking your prey to assert your place in the animal chain of power. Will you have what it takes to become the new king of beasts? The game started development on the Nintendo 64, but went unreleased, being later ported to the Nintendo GameCube. A prototype of the Nintendo 64 version has been found

An enhanced version of the Superman game for Nintendo 64 which was cancelled due to license expiration. Although both games are related, the PlayStation version was going to have many improvements over the original game and a complete overhaul on the gameplay sequences, focusing on exploration and combat. A late prototype was found and dumped online.