Dream: Land of Giants

A mysterious game that was being developed for the 64DD by a team at HAL Laboratory headed by Yoichi Yamamoto, a former construction engineer. While little is known of the game in its original form, it is believed that many of the game's features were later incorporated into Pokémon Snap, developed by the "Jack & Beans" team.

Barbie: Vacation Adventure is an adventure video game that takes Barbie on educational field trips throughout the United States of America. It was planned for release in 1994.

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.

The fourth and final game in the SwordQuest series. Ever since the glorious history of this franchise with it's comics, merchandise, and competitions, the story sadly never got it's conclusion back then with the 3rd entry: Waterworld, being considered the last... until now! The Atari and Digital Eclipse Heavens have opened up to finally allow us to experience the 4th and Final Entry! Ascend into the the heavens in Swordquest: AirWorld! The game finally release 2022 as part of the Atari 50: The Anniversary Celebration.

Jungle Emperor Leo was a 1997 movie based on the 1950's manga by Osamu Tezuka, Kimba the White Lion (incidentally, the inspiration for Disney's The Lion King). Nintendo secured the rights to develop a game based on the movie which was announced for the 64DD. The game appears to have been an action-adventure title starring characters from the movie and manga, but very little footage of the game was shown, so details are scarce.

Based on the video board game of the same name. You must escape the undead realm of the Gatekeeper and avoid your worst nightmare. A prototype of Atmosfear (also known as NightMare) dated July 12, 1994 was released by Hidden Palace in April 7, 2019.

In development by Bits Studios, RiQa was shown at E3 1999 and appeared to be heavily inspired by PlayStation title, Tomb Raider. It was a third-person perspective action and exploration game starring a female protagonist. The game was only shown once, and then was delayed several times before being dropped, with very few details provided. However, it is believed that Bits Studios later used elements from RiQa in its multiformat 2003 title Rogue Ops. Some prototype builds were dumped and released onto the internet on April 2024.