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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
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
Nov 23, 2022: Sonic 3 and Feel Preproduction VHS Tapes!
Oct 31, 2022: Happy Halloween 2022! Castlevania: Symphony of the Night for the Tiger Game.com!
Jan 1, 2022: New Years 2022!
Nov 13, 2021: Go Go Goemon! Mystical Ninja Goemon Zero
Oct 10, 2021: Mortal Kombat prototype for the Sega Mega Drive
Sep 18, 2021: Project Deluge: Xbox and Dreamcast
Jul 24, 2021: Angels with Burning Hearts: Burning Rangers Prototype
May 1, 2021: Crash Landing
Apr 17, 2021: Project Deluge: PlayStation 1, Saturn, and CD-I (Part 2)
Mar 20, 2021: Project Deluge: PlayStation 2
Jan 1, 2021: Dreams Come True: Sonic 1 (MD) Prototype
(earlier news)
Latest news
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Adventures to Go! (Jun 12, 2009 prototype)
Atari Classics Evolved (Oct 1, 2007 prototype)
Crash: Mind over Mutant (Sep 7, 2008 prototype)
Disgaea Infinite (Mar 17, 2010 prototype)
Dungeon Maker: Hunting Ground (May 9, 2007 prototype)
Hammerin' Hero (Nov 28, 2008 prototype)
Holy Invasion Of Privacy, Badman! What Did I Do To Deserve This? (May 11, 2009 prototype)
Mana Khemia: Student Alliance (Dec 9, 2008 prototype)
Metal Slug XX (Sep 26, 2009 prototype)
Monster Hunter Freedom Unite (Jan 29, 2009 prototype)
BlazBlue: Continuum Shift II (Feb 28, 2011 prototype)
Warriors Orochi 2 (May 7, 2009 prototype)

Discuss this release on our Discord server!

Hello everyone! Sorry to keep you waiting since the holidays!

We have a few things cooked up for you in the not-so-distant future, but for now, we’d like to share something that will tide you over. We have a few “release candidate” PSP prototypes, builds that are near final but didn’t pass initial certification and needed a second version before being published. These prototypes were brought to you by Jehuty who had a treasure trove of almost 100 UMDs!

The games featured in this lot are all the ones that are confirmed to be different from anything released. These were verified using the same technology that helped us with Deluge, so we could confirm that these were all unique builds compared to the Redump set as of writing. The UMDs were dumped by site administrator Sazpaimon using PSP Filer v6.6 on the original hardware.

Until next time!
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