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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
Jun 8 2019: Universal Wrestling Corporation (Unreleased NES game)
May 5 2019: The Jungle Book + Some Extra Goodies
Apr 20 2019: Tom Vs. Jerry: The Chase is On
Apr 7 2019: Atmosfear / NightMare
Mar 31 2019: Dreamcast Month Part 4 - Ecco the Dolphin
Mar 24 2019: Dreamcast Month Part 3 - Tony Hawk & Stunt GP
Mar 18 2019: Dreamcast Month Part 2 - Sonic Adventure 2 Review
Mar 10 2019: Dreamcast Month Part 1 - Internet Game Pack
Mar 6 2019: Pinocchio SNES
Feb 24 2019: Star Wars & Star Trek
Feb 17 2019: Doom Troopers And Some More SNES
Feb 14 2019: What Was Once Old Is New Again
Feb 11 2019: NBA Jam and Atari Jaguar
Feb 3 2019: A Proto Sandwich
Jan 27 2019: When You Wish Upon a 32-bit Star
Jan 20 2019: An Old Can of Worms!
Jan 1 2019: A Spooky New Years!
Dec 25 2018: A Merry Eidos Christmas
Jan 11 2018: F-1 World Grand Prix Prototype (GBC)
Jan 1 2018: Early Battlecorps Prototype for the Sega CD
Dec 25 2017: Sonic CD (8/1/93) prototype
Feb 25 2017: Captain Lang and Mickey Mania Prototypes
Feb 6 2017: Lion King (SNES)
Jan 8 2017: Sonic the Hedgehog Pocket Adventure Prototype
Jun 28 2016: Defender of the Universe (Dreamcast) (Ecco month part 2)
Jun 17 2016: Ecco II - Sentinels of the Universe (Ecco month part 1)
May 27, 2016: Final ROM Archive Release Part 4
May 20, 2016: Final ROM Archive Release Part 3
May 13, 2016: Final ROM Archive Release Part 2
May 2, 2016: 10 years of Hidden Palace / Final ROM Archive Release Part 1
Oct 22, 2011: Tomb Raider E3 Demo
Oct 12, 2011: Miscellanea
Mar 22, 2011: 15th Anniversary of Resident Evil
Jul 30, 2010: Stone Protectors Genesis + Super Mario All-stars
Jul 20, 2010: Sonic Spinball 1910 5/8
Jul 16, 2010: Sega Art Tool, Sega Sound Tool, GEMS 2.8 ROM
(earlier news)
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Latest news
Run Saber (Jan 27, 1993 prototype).2019-06-22 11.36.29.png
Aero the Acro-Bat 2 (Aug 8, 1994 prototype).2019-06-22 11.51.44.png
Arcade's Greatest Hits - The Atari Collection 1 (Apr 11, 1997 prototype).2019-06-22 11.48.00.png
Arcade's Greatest Hits - The Atari Collection 1 (Feb 11, 1997 prototype).2019-06-22 11.50.48.png
Arcade's Greatest Hits - The Atari Collection 1 (Feb 10, 1997 prototype).2019-06-22 11.50.15.png

Run Saber (Jan 27, 1993 prototype)
Aero the Acro-Bat 2 (Aug 8, 1994 prototype)
Arcade's Greatest Hits: The Atari Collection 1 (Feb 10, 1997 prototype)
Arcade's Greatest Hits: The Atari Collection 1 (Feb 11, 1997 prototype)
Arcade's Greatest Hits: The Atari Collection 1 (Apr 11, 1997 prototype)
The Death and Return of Superman (Aug 8, 1994 build)
Discuss this release on the boards here!

Hello folks. We have a couple of SNES treats for you for today. These prototypes were brought to you by Baker64!

Run Saber (Jan 27, 1993 prototype).2019-06-22 11.36.29.png
Run Saber (Jan 27, 1993 prototype).2019-06-22 11.45.46.png
Run Saber (USA).2019-06-22 12.04.20.png

Run Saber (Jan 27, 1993 prototype)
First up, we have a nice prototype of Run Saber! This has some really interesting changes in comparison to the final version. The biggest of which is that the boss for the end of level 2 was altered from a woman to a corpse (see the comparison picture above)! There are also some other gameplay related changes as well. What differences can you find?

Coincidentally, a later prototype was actually released by a scene group called LEGEND back in April of 1993. This prototype hasn’t been documented before, and unfortunately is altered from the final release since it contains a trainer. The unaltered ROM has never been released.

Aero the Acro-Bat 2 (Aug 8, 1994 prototype).2019-06-22 11.51.44.png
Aero the Acro-Bat 2 (Aug 8, 1994 prototype).2019-06-22 11.54.50.png
Aero the Acro-Bat 2 (Aug 8, 1994 prototype).2019-06-22 11.56.10.png

Aero the Acro-Bat 2 (Aug 8, 1994 prototype)
Next we have a late prototype of Aero the Acro-Bat 2. There are only some small changes in comparison to the final release. We’re not sure what gameplay changes were made however, as there is evidence of some code changes throughout the ROM as well.

Arcade's Greatest Hits - The Atari Collection 1 (Apr 11, 1997 prototype).2019-06-22 11.48.00.png
Arcade's Greatest Hits - The Atari Collection 1 (Feb 10, 1997 prototype).2019-06-22 11.50.15.png
Arcade's Greatest Hits - The Atari Collection 1 (Feb 11, 1997 prototype).2019-06-22 11.50.48.png

Arcade's Greatest Hits: The Atari Collection 1 (Feb 10, 1997 prototype)
Arcade's Greatest Hits: The Atari Collection 1 (Feb 11, 1997 prototype)
Arcade's Greatest Hits: The Atari Collection 1 (Apr 11, 1997 prototype)
Next we have a bunch of prototypes for Arcade’s Greatest Hits: The Atari Collection 1 for the SNES. This collection is interesting as this is one of the earliest collections featuring Atari’s arcade classics. The games featured in this collection are actually ported from their original source code to the SNES. The first two prototypes are actually separate prototypes for Centipede and Missile Command respectively. The April prototype is a prototype for the entire collection, which still has its fair share of differences in comparison to the final release. Be sure to check this out!

DeathReturnSuperman.FE5C.2019-06-22 11.27.02.png
DeathReturnSuperman.FE5C.2019-06-22 11.28.24.png
DeathReturnSuperman.FE5C.2019-06-22 11.27.34.png

The Death and Return of Superman (Aug 8, 1994 build)
Finally, we were also given a slightly altered build of The Death and Return of Superman as well. This build only has a single byte change in comparison to the first US release (Death and Return of Superman, The (USA) from No-Intro). The byte was changed to serve as a fingerprint/watermark to track preview/review copies of games to their intended party in the event that the games were ever leaked early. This game, along with the Aero the Acro-bat 2 prototype, are fingerprinted to the same party. That party remains a mystery, however.

Until next time!