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The Hidden Palace is a community dedicated to the preservation of video game development media (such as prototypes, hardware, source code, artwork, and more). This website can be utilized as a catalog for the items that we and others are able to collect and share.

If you are interested in contributing, please see our How to Contribute page.

Past news

Jan 24, 2026: Beavis and Butt-Head do Hollywood

Jan 1, 2026: Year of Spore

Dec 25, 2025: One Bad Ass Hedgehog - Shadow the Hedgehog

Nov 26, 2025: A Mojave Thanksgiving - Fallout: New Vegas Prototype

Oct 31, 2025: Happy Halloween 2025! Dark Empires Prototype & Craig Stitt Interview

Jun 29, 2025: Animaniacs - Hollywood Hypnotics

Feb 1, 2025: Frogger 2 Full Development Archive

Jan 1, 2025: Happy NES Year

Dec 26, 2024: NESMas - Day 2

Dec 25, 2024: NESMas - Day 1

Jul 6, 2024: Vanished without a Trace - Out of the Vortex for the Sega Mega Drive

Apr 9, 2024: Crash Tag Team Racing (Xbox Prototype)

Jan 21, 2024: Crash Bash and Spyro 3

Jan 1, 2024: New Years 2024 - Sonic Heroes

Dec 25, 2023: A Very Bandicoot Christmas - Crash Bandicoot: Warped Prototype

Nov 24, 2023: 6GUN: BattleBourne's Unreleased PlayStation 2 Game

Oct 31, 2023: Daredevil: The Man Without Fear - Unreleased PlayStation 2 Game

Feb 28, 2023: Phantasy Star Online Prototype

Feb 15, 2023: PSP Release Candidates

Dec 25, 2022: Project Deluge: Xbox 360 and Wii

Dec 9, 2022: Semradical!

Nov 24, 2022: Sega Technical Institute’s Cancelled Segapede

(earlier news)

Latest contributed articles

• News/Beavis and Butt-Head Do Hollywood by Sazpaimon
• Spider-Man (New Level Soft) (July 27, 1998 prototype) by Sazpaimon
• Spider-Man (New Level Soft) (Oct 8, 1998 prototype) by Sazpaimon
• Beavis and Butt-Head Do Hollywood (Sep 2, 1998 prototype) by Sazpaimon
• Beavis and Butt-Head Do Hollywood (Nov 10, 1998 prototype) by Sazpaimon
• Beavis and Butt-Head Do Hollywood (Nov 1, 1998 prototype) by Sazpaimon
• Beavis and Butt-Head Do Hollywood (Mar 4, 1998 prototype) by Sazpaimon
• Grand Theft Auto IV (Jan 30, 2009 Patch Data prototype) by Funtimeandrefoxy
• Exerion (PAL prototype) by Ndiddy
• And Yet It Moves (Build 1.04) by MattTheCatt
(more)

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Latest news

World of Illusion starring Mickey Mouse & Donald Duck (Prototype B)
Primal Rage (Prototype)
College Football USA 96 (Jun 21, 1995 prototype)
Granada (REV01 prototype)
Australian Rugby League (Prototype)
Discuss this release on our Discord server!

Continuing on with our holiday offerings, have have a couple things to share with you today! Some of these prototypes were generously donated to us just in time for the holiday season.

First up, we have a prototype of one of our personal favorites - World of Illusion starring Mickey Mouse & Donald Duck for the Sega Mega Drive! This prototype is slightly later than the prototype already released, but this is the first time a proper dump of a similar prototype has been made available. Upon comparing the new prototype we acquired, we discovered that the other prototype had been modified from its source from scene group MAGICAL which might be the original group responsible for the release of the other prototype. There exists an alternative ROM with a hacked scene intro which credits MAGICAL with the release. This prototype has some small changes in comparison to the other prototype, but is mostly the same. For instance, the player is no longer invincible unlike the other prototype, but free movement mode is still enabled. Some palettes were altered here and there, but the sound track seems to be the same. What other differences can you find?

Next, an early prototype of Primal Rage for the Nintendo Game Boy! This prototype was donated to by JakeS909 before the holiday season, so we decided to release it so that others can spot the differences. This prototype contains many tiny changes in comparison to the final. What differences can you find?

These next Sega Mega Drive prototypes were generously donated to us by Baker64! First up, we have a prototype of the second revision of Granada which contains a few code related changes. Australian Rugby League is a very late prototype with only a few changes in the code and data. College Football USA 96 was built just a few days before final, and only contains a few byte changes in comparison to the final.

We'd like to thank everyone who donated things for us to share so far. It's people like you that make this community great. Without you, there's nothing we can't do.

Until next time! See you tomorrow!