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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.

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Adventures of Dr. Franken (Prototype)
Beethoven's 2nd: The Quest for Pups (Prototype)
Bio Force Ape (US Prototype)
Blade Warrior (Prototype)
Dungeon Warrior (Prototype)
Jet Pak Jak (Prototype)
Jet Pak Man (Prototype)
John Madden Football (Prototype A)
Learn and Play: Blackjack & Solitaire (Aug 9, 1994 prototype)
Lobo (April Prototype)
Mer Wars (Prototype)
Mike Ditka's Big Play Football (Prototype)
Mr. Tuff (Jun 21, 1994 prototype)
Nightmare Busters (Apr 9, 1994 prototype)
Nintendo Game Boy Aging Cartridge
Out of the Vortex (Prototype)
Payne Stewart Pro Golf (Prototype A)
Payne Stewart Pro Golf (Prototype B)
R.B.I. Baseball '95 (Mega Drive Prototype)
Reactor (Prototype)
Road Riot 4WD (Prototype)
RoboCop (GBA Prototype)
San Francisco Rush: Extreme Racing (Game Boy Color Prototype)
Space Hero (Prototype)
Spot Goes To Hollywood 32x (Prototype)
Super Full Metal (Prototype B)
Super Full Metal (Prototype C)
Super Full Metal (Prototype D)
Time Warner 32X CMD Download Cartridge
TV Sports Baseball (Prototype)

Ace Combat Advance (Prototype)
Advanced Dungeons & Dragons: Hillsfar (Prototype)
Air Zonk (Prototype)
Alfred Chicken (Prototype)
Alone in the Dark: The New Nightmare (Prototype)
Antz (Prototype)
Asterix (Mar 11, 1993 prototype)
Asterix (Prototype A)
Asterix (Prototype B)
Asterix & Obelix XXL (Prototype A)
Asterix & Obelix XXL (Prototype B)
Asteroids (Game Boy Prototype)
Atomic Betty (Prototype)
Back to Stone (Prototype)
Ballz 3D: Fighting at Its Ballziest (Prototype)
Barbie: Game Girl (Prototype)
Battle Blaze (Prototype B)
Battle Ships (Prototype)
Beach'n Ball (Nov 21, 2000 prototype)
Beyblade V-Force: Ultimate Blader Jam (Prototype)
Blaster Master Boy (Prototype)
Bomb Jack (Prototype A)
Bomb Jack (Prototype B)
Bonk's Adventure (Prototype)
Bubble Ghost (Prototype)
Caesar's Palace (Prototype B)
Captain Novolin (Prototype)
Clay Fighter (Prototype)
Claymates (Prototype A)
Cosmo Tank (US Prototype)
Crazy Taxi: Catch a Ride (Prototype)
Die Maus (Prototype)
Die Maus: Verrueckte Olympiade (Prototype)
Digimon: Battle Spirit (Prototype)
Dr. Mario (Prototype C)
Dragon Ball Z: Legendary Super Warriors (English Prototype - All Features Unlocked)
Dragon Ball Z: Legendary Super Warriors (French Prototype)
Dragon Ball Z: Legendary Super Warriors (German Prototype - 1 3 20 03 02)
Dragon Ball Z: Legendary Super Warriors (German Prototype - 11 04 02 No Cheat)
Dragon Ball Z: Legendary Super Warriors (German Prototype - All Features Unlocked)
Dragon Ball Z: Legendary Super Warriors (German Prototype)
Dragon Ball Z: Legendary Super Warriors (Italian Prototype - All Features Unlocked)
Dragon Ball Z: Legendary Super Warriors (Japanese Prototype - Cheat)
Dragon Ball Z: Legendary Super Warriors (Japanese Prototype)
Dragon Ball Z: Legendary Super Warriors (Spanish Prototype - All Features Unlocked)
Dragon Ball Z: Legendary Super Warriors (Spanish Prototype)
Dragon Ball Z: Supersonic Warriors (Prototype A)
Dragon Ball Z: Supersonic Warriors (Prototype B)
Dragon Ball Z: Taiketsu (Prototype)
Dragon Ball: Advanced Adventure (Feb 25, 2005 prototype)
Dragon Warrior II (Prototype)
Driv3r (Prototype A)
Driv3r (Prototype B)
Driv3r (Prototype C)
Driver 2 Advance (Jun 6, 2002 prototype)
Driver: You are the Wheelman (Prototype)
Dropzone (Prototype)
Duel Masters: Kaijudo Showdown (Prototype)
Duel Masters: Sempai Legends (Prototype)
Dungeons & Dragons: Eye of the Beholder (Prototype)
Ex-Mutants (Prototype)
Flashback (Sep 18, 1992 prototype)
Ghostbusters II (Game Boy Prototype)
Illusion of Gaia (Prototype B)
Jimmy Connors Tennis (Prototype)
Junker's High (Prototype B)
Kick Off 3: European Challenge (Prototype)
Kid Paddle (Jul 8, 2005 prototype)
Kid Paddle (Jun 28, 2005 prototype)
Kid Paddle (Prototype)
Klustar (Early Prototype)
Klustar (Oct 1, 1998 Europe Prototype)
Klustar (Oct 1, 1998 Japanese Prototype)
Lakers versus Celtics and the NBA Playoffs (Prototype)
Lethal Weapon (Prototype)
Looney Tunes Collector: Martian Alert! (Prototype)
Loopz (Prototype)
Lucky Luke: Desperado Train (Prototype)
Marvel Super Heroes: War of the Gems (Prototype B)
MechWarrior (Prototype B)
Metal Masters (Prototype)
Mickey's Ultimate Challenge (Nov 12, 1993 prototype)
Micro Machines 2: Turbo Tournament (Prototype)
Mighty Morphin Power Rangers (Prototype)
Mind Bender (Mar 4, 1991 prototype)
Moero!! Junior Basket: Two on Two (Prototype)
Monster Max (Apr 1, 1993 prototype)
Moomin's Tale (Prototype)
Muhammad Ali Heavyweight Boxing (Later prototype)
NBA All-Star Challenge (Prototype)
NBA Live 97 (Sep 20, 1996 prototype)
NES Open Tournament Golf (Prototype)
NES Play Action Football (Prototype)
NFL 98 (Prototype)
Nicktoons Racing (Prototype)
Nigel Mansell's World Championship Racing (Prototype)
Ninja Gaiden III: The Ancient Ship of Doom (Prototype)
Ninja Taro (Prototype B)
Otto's Ottifanten (Prototype)
Pinball: Revenge of the 'Gator (Prototype)
Pit-Fighter (Oct 13, 1992 prototype)
Prehistorik Man (Prototype)
Prince of Persia (SNES prototype)
Putty Squad (Prototype)
Race Drivin' (Game Boy Prototype)
Race Drivin' (Mega Drive Prototype)
Race Drivin' (SNES Prototype)
Rampart (Prototype)
Rebelstar: Tactical Command (Prototype)
SEGA Rally Championship (Prototype)
Sesame Street: Countdown (Prototype)
Shadowrun (Prototype B)
Ski or Die (Prototype)
Slap Fight MD (Prototype)
Snoopy Tennis (Prototype)
Spider-Man 3: Invasion of the Spider-Slayers (Apr 11, 1993 prototype)
Stanley: The Search for Dr. Livingston (Prototype A)
Star Trek: The Next Generation (Prototype)
Super Ghouls 'N Ghosts (Prototype)
Super Monkey Ball Jr. (Aug 6, 2002 prototype)
Suske en Wiske: De Tijdtemmers ~ Bob et Bobette: Les Dompteurs du Temps (Prototype A)
Suske en Wiske: De Tijdtemmers ~ Bob et Bobette: Les Dompteurs du Temps (Prototype B)
Sylvester & Tweety in Cagey Capers (Prototype B)
Teenage Mutant Ninja Turtles II: Back from the Sewers (May 20, 1991 prototype)
Teenage Mutant Ninja Turtles II: Back from the Sewers (Prototype B)
Tengen Tetris (Prototype A)
Tengen Tetris (Prototype B)
Tengen Tetris (Prototype C)
Tengen Tetris (Prototype D)
Tesserae (Prototype)
The Ignition Factor (Prototype B)
The Lawnmower Man (Game Boy Prototype)
The Peace Keepers (Prototype)
The Revenge of the Smurfs (Mar 22, 2002 prototype)
The Simpsons: Bart vs. the Space Mutants (Prototype)
The Smurfs (Prototype)
Tintin: Temple du Soleil (Prototype)
Tiny Toon Adventures: Babs' Big Break (Jul 16, 1991 prototype)
Tiny Toon Adventures: Babs' Big Break (Sep 6, 1991 prototype)
Titeuf: Mega Compet (Prototype)
Tom and Jerry: Frantic Antics! (Prototype)
Tootuff (Prototype)
Totally Spies! 2: Undercover (Prototype)
Troddlers (Feb 10, 1993 prototype)
Troddlers (Oct 23, 1992 prototype)
Twisted Flipper (Prototype B)
UEFA 2000 (Prototype)
Ultra Golf (Nov 20, 1991 prototype)
Utopia: The Creation of a Nation (Prototype)
Wayne Gretzky and the NHLPA All-Stars (Prototype)
WDL: World Destruction League - Thunder Tanks (Prototype)
World Beach Volley: 1992 GB Cup (Prototype)
Worms Armageddon (Prototype)
Yu Yu Hakusho: Ghostfiles - Spirit Detective (Prototype)
Zoop (Prototype)

Happy New Years everyone!

Over the past year, we released over 1,000 prototypes thanks to the fruits of the Project Deluge lot. We hope to continue the trend going into the new year. So what better way to start off the new year with another sizeable release?

To start off the new year with a bang, we’re releasing 178 prototypes for various cart-based systems (it’s been a while, huh?). With almost 30 of them consisting of unreleased games, some of which you might have never seen before! These were generously donated to us over the years and evaluated by the same team that helped with Project Deluge. We’ve been sitting on these for quite a while now and can’t think of a better time than now to do something with them.

As you might have noticed, unfortunately, there’s no Sonic today. As of today, there are prototypes for seemingly every Sonic game out there. Hopefully, we will find something to share with you soon… 🦔

Finally, some thanks are definitely in order! As we said before a lot of people contributed prototypes for this release. Some wish to remain anonymous, however, we’d like to give special shoutouts to those who were patient enough to wait for us to finally get around to releasing these!

The Video Game History Foundation Logo.jpeg

First, we’d like to thank Frank Cifaldi from the Video Game History Foundation for providing us with the opportunity to release many of the prototypes that we have for today. While many of the prototypes for this release were given to us individually, many of them came from sources that have worked with Frank in an effort to digitize and archive as much as possible through the efforts of VGHF. There are just too many prototypes to list here! Some of the prototypes that came from Frank were spread and also given to the kind folks at and Without him, this and many other releases would not have been possible.

Along with Frank, we’d also like to thank Steve Lin for allowing us to release his NES/SNES/MD/GB prototypes today as well. Many of the games he shared with us were previously unreleased and often were only teased by other collectors like Reactor (Prototype) and Mer Wars (Prototype). He also provided one of the prototypes of the unreleased Payne Stewart Pro Golf (Prototype B) and San Francisco Rush: Extreme Racing (Game Boy Color Prototype) as well!

Next, we’d like to thank Stephan Reese for sharing a number of NES/SNES prototypes that you saw today. Stephan is no stranger to the site, as he was the one that provided us with the Final Fantasy 1 US localization prototype and the EarthBound localization prototype from a year ago. This time, Stephan provided us with some great NES prototypes of Dr. Mario (Prototype C), Dragon Warrior II (Prototype), NES Open Tournament Golf (Prototype), NES Play Action Football (Prototype), and Ninja Gaiden III: The Ancient Ship of Doom (Prototype). He was also kind enough to provide prototypes for the SNES such as Illusion of Gaia (Prototype B), MechWarrior (Prototype B), and Shadowrun (Prototype B). We hope that he continues to find more Nintendo goodies in the months to come!

We’d like to also thank Marcal Mora for generously donating the unreleased GBA RoboCop as this was a surprising find!

We’d like to thank the members of the Project Deluge team (ehw, Zoda, and Hwd45) for going through all of these games over the past several months on top of going through all of the stuff for the Deluge lot at the same time. We have gone through a few thousand prototypes within this year alone and next year looks no different. We’d like to thank Sazpaimon for hosting the holiday stream this year as well as all the other streams that were hosted over the course of this year.

Finally, we’d like to thank all the site contributors and other heroes from the other preservation communities like Obscure Gamers, Andrew Borman from the Museum of Play, Bock from, Evan_G from, togemet2 and Marionova64 from Forest of Illusion, Game Preservation Society, Redump, TOSEC, Gaming Alexandria, The Cutting Room Floor and many many many more! The future remains bright for video game preservation with absolutely no end in sight. It’s possible that 2022 will be the brightest yet!

With that said, until next time! Have a happy holiday!

EDIT (1/1/2022) - We forgot to check our stockings! We added 7 additional Game Boy prototypes, with one of them being a prototype of the unreleased John Madden Football for the Nintendo Game Boy. Check out the new additions below:

Alfred Chicken (Prototype)
Bonk's Adventure (Prototype)
Jimmy Connors Tennis (Prototype)
John Madden Football (Prototype A)
Lethal Weapon (Prototype)
Monster Max (Apr 1, 1993 prototype)
Tesserae (Prototype)

Additionally, there were a few bad ROMs that were found in various lots. These unfortunately can't be redumped as the original EPROMs are lost to time, File:Hidden Palace New Years 2022 - Bad ROMs (Coal).zip
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