| Desert Fighter (Nov 9, 1993 prototype) | SNES | ACC-DFIG.LZH (original) ACC-DFIX.LZH (IPS patch) | Accumulators | | JP Feb 18, 1994 EU Sep 1994 US Jan 1995
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| Destruction Derby Arenas (Nov 10, 2003 prototype) | PlayStation 2 | o-derbya | ORGASM | | US Apr 1, 2004 EU Jan 9, 2004
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| Disney's Beauty and the Beast (SNES prototype) | SNES | ILS-BATB.LZH | Illusion | | US Jul 1, 1994 JP Jul 8, 1994 EU Feb 23, 1995
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| Disney's Dinosaur (Game Boy Color prototype) | Game Boy Color | {{{origin_files}}} | KEL | | US May 19, 2000 EU Oct 6, 2000
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| Disney's The Haunted Mansion (Game Boy Advance prototype) | Game Boy Advance | trm-dthm.zip | Trashman | | |
| Disney-Pixar Finding Nemo (German prototype) | Game Boy Advance | SXS-NEMO.ZIP | SUXXORS | | US May 10, 2003 EU Sep 26, 2003 JP Dec 6, 2003
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| Dolphin Force (prototype A) | Commodore 64 | DOLPHIN FORCE PV.PRG | Bros | | |
| Dolphin Force (prototype B) | Commodore 64 | DOLPHIN FORCE.PRG | Bros | | |
| Dominion (Micro Media prototype) | Commodore 64 | Dominion+2HD-GP.d64 | Genesis Project | | |
| Doom II: Hell on Earth (Aug 25, 1994 prototype) | PC | DOOM2 | Razor 1911 | | JP Sep 29, 1995 (PC-98) US Oct 10, 1994 (MS-DOS) US Jun 27, 1995 (Mac OS) EU Mid-Late 1994 (DOS)
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| Doomed World (prototype) | Commodore 64 | {{{origin_files}}} | Genesis Project | | |
| Dr. Robotnik's Mean Bean Machine (Prototype) | Sega Mega Drive | PR-ROBOT.LZH | PREMIERE | | US Nov 26, 1993 EU Nov 1993
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| Dragon Ball Z: Budokai 3 (Sep 27, 2004 prototype) | PlayStation 2 | cky-dbz | CKY | | JP Feb 10, 2005 EU Dec 3, 2004 US Nov 16, 2004
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| Dragon Slayer (Linel prototype) | Commodore 64 | D.SLAYER-/ACTION.PRG | ACTION | | |
| Dragon View (prototype) | SNES | FLT-DRA2.LHA | FAIRLIGHT | | JP Aug 26, 1994 US Nov 1994
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| Dragon's Lair (SNES Prototype) | SNES | DRGNLAIR.LZH | INDEPENDENT | | US Feb 1993 EU Feb 18, 1993
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| Dream TV (ACCUMULATORS prototype) | SNES | DRMTVFIX.LHA | Accumulators | | US Apr 1994
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| Dream TV (FAIRLIGHT prototype) | SNES | FLT-DRTV.LZH | FAIRLIGHT | | US Apr 1994
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| Droopy's Tennis Open (May 14, 2002 prototype) | Game Boy Advance | EUR-DTEN.ZIP | Eurasia | | EU 2002
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| Dynamite Headdy (April 1994 prototype) | Sega Mega Drive | scx-head.lzh | SCOOPEX | | JP Aug 5, 1994 US Aug 4, 1994 EU Oct 1, 1994
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| Dynasty Warriors 5 (Mar 23, 2005 prototype) | PlayStation 2 | dev-dyw5 | DEVOTiONS | | JP Feb 24, 2005 US Mar 29, 2005 EU Jun 24, 2005
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| ESPN Baseball Tonight (prototype) | SNES | PR-ESPNS.LZH | PREMIERE | | US May 1994 EU Nov 1994
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| ESPN NFL PrimeTime 2002 (Aug 7, 2001 prototype) | PlayStation 2 | ztx-nflpt | ( Z T X ) | | US Oct 30, 2001
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| ESPN National League Hockey Night (Prototype) | Sega Mega Drive | MOB-ESPN.LZH | Lynchmob | | US Dec 1994
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| ESPN SpeedWorld (SNES prototype) | SNES | PR-SPEED.LZH | PREMIERE | | US 1994
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| ESPN Winter X Games Snowboarding 2002 (Aug 9, 2001 prototype) | PlayStation 2 | ztx-espnb22r | ( Z T X ) | | JP Nov 29, 2001 EU Mar 15, 2002 US Jan 17, 2002
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| Earthworm Jim 2 (SNEAKERS Prototype) | SNES | SNK-EWJ2.LHA | SNEAKERS | | US Nov 1995 EU Jan 25, 1996
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| Ecco: The Tides of Time (Early prototype) | Sega Mega Drive | PDX-ECC2.lzh | PARADOX | | JP Aug 26, 1994 US Aug 25, 1994 EU Aug 27, 1994
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| Elaroo (prototype) | Commodore 64 | {{{origin_files}}} | Bronx | | |
| Equinox (prototype) | SNES | FLT-EQX.LHA | FAIRLIGHT | | JP Nov 12, 1993 US Mar 1994 EU Mar 25, 1994
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| Escape from Colditz (Commodore 64 prototype) | Commodore 64 | {{{origin_files}}} | SUCCESS | | |
| Eternal Champions (Prototype) | Sega Mega Drive | SCX-ETCH.LZH | SCOOPEX | | JP Feb 18, 1994 US Dec 1993 EU Jan 16, 1994
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| Evil Islands: Curse of the Lost Soul (Oct 10, 2000 prototype) | PC | {{{origin_files}}} | KeliSO | | RU Oct 26, 2000 US Apr 16, 2001
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| F-1 World Grand Prix (PAL prototype) | Nintendo 64 | NIL-F1GP.ZIP | NIL | | JP Dec 18, 1998 US Jul 31, 1998 EU Sep 14, 1998
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| FIFA Soccer 2005 (Sep 22, 2004 prototype) | N-Gage | enf2k50#.zip | ENGAGE | | EU Oct 28, 2004 US Nov 10, 2004
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| FILA Declathon (Prototype) | Game Boy Advance | pcx-caes | Paracox | | EU Mar 29, 2002
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| Fahrenheit (May 19, 2005 prototype) | Xbox | dev-frndemo | DEVOTiONS | | US Sep 26, 2005 EU Sep 16, 2005
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| Fantastic Dizzy (prototype) | Sega Mega Drive | DIZZY_pre | INDEPENDENT | | US Sep 21, 1993 EU Oct 1993
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| Feda: The Emblem of Justice (SNES prototype) | SNES | CF-FEDA.LZH | Cyber Force | | JP Oct 28, 1994
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| Fighter's History (Prototype) | SNES | NUM-FHIS.LZH | NUMBERS | | US May 1994 EU 1994
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| Firestriker (Prototype) | SNES | PR-FIRE.LZH | PREMIERE | | JP Dec 17, 1993 US Oct 1994
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| Flashback Legends (Jun 21, 2002 prototype) | Game Boy Advance | trm-fblg.zip | Trashman | | |
| Fleet Defender (Jan 10, 1994 prototype) | PC | NX-F14B | NEXUS | | US 1994
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| Formula One 05 (Apr 29, 2005 prototype) | PlayStation 2 | ggs-f12k5 | GGS | | JP Sep 22, 2005 EU Jul 1, 2005
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| Fred the Fruiter (Pumpkin prototype) | Commodore 64 | {{{origin_files}}} | The Ruling Company SUCCESS | | DE Oct 1996
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| Fullmetal Alchemist and the Broken Angel (Jul 14, 2004 prototype) | PlayStation 2 | mrn-full | MORRiGAN | | JP Dec 25, 2003 US Jan 18, 2005
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| Future World (F4CG prototype) | Commodore 64 | {{{origin_files}}} | F4CG | | |
| Future World (HITMEN prototype) | Commodore 64 | {{{origin_files}}} | HITMEN | | |
| GP-1 Racing (Mar 17, 2003 prototype) | Game Boy Advance | r18-gp1 | R18 | | |
| Gauntlet (CENSOR prototype) | Sega Mega Drive | CEN-GAUN.LZH | CENSOR | | JP Sep 17, 1993 US Oct 1993 EU Sep 17, 1993
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| Go-Kart (prototype) | Commodore 64 | GOKART.D64 | ONSLAUGHT LAXITY | | |
| Grand Prix Legends (Aug 13, 1998 prototype) | PC | TRPSGP | TRPS | | US Oct 6, 1998 EU 1998
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| Great Naval Battles: Guadalcanal 1942-1943 (Feb 1, 1994 prototype) | PC | NX-GNB2 | NEXUS | | US 1994
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| Grell & Fella in the Enchanted Gardens (Commodore 64 prototype) | Commodore 64 | {{{origin_files}}} | Pride | | |
| Gremlins: Stripe vs. Gizmo (Feb 19, 2002 prototype) | Game Boy Advance | eur-grem.zip | Eurasia | | US Nov 27, 2002 EU Jun 27, 2003
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| Guilty Gear Isuka (Aug 15, 2004 prototype) | PlayStation 2 | lfc-ggiu | LIGHTFORCE | | JP Jul 29, 2004 US Nov 2, 2004 EU Jun 16, 2005
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| Gunmetal (Aug 1, 1998 prototype) | PC | {{{origin_files}}} | PDM | | US Aug 28, 1998
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| Hagane: The Final Conflict (prototype) | SNES | CRE-HAGF.LZH | CREAM | | JP Nov 18, 1994 US Apr 1995 EU Jun 1995
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| Hakunetsu Pro Yakyuu '93: Ganba League (Prototype) | SNES | M-GLBJ | MAGICAL | | JP 1992
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| Half-Life (Aug 16, 2001 prototype) | PlayStation 2 | ztx-hl | ( Z T X ) | | JP N/A US Nov 11, 2001 US Nov 30, 2001
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| Half-Life (Nov 1, 1998 prototype) | PC | HL.ACE | Class | | US Nov 19, 1998 EU Nov 27, 1998
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| Henry (Hardcore prototype) | Commodore 64 | {{{origin_files}}} | Hardcore | | |
| Henry (TRANCE prototype) | Commodore 64 | {{{origin_files}}} | TRANCE | | |
| Hey Arnold! The Movie (Apr 18, 2002 prototype) | Game Boy Advance | asg-ha.zip | Asgard | | US May 31, 2002 EU August 30, 2002
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| Highway Hunter (Oct 25, 1994 prototype) | PC | {{{origin_files}}} | DoD | | US Oct 23, 1994
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| Home Alone (July 1992 prototype) | Sega Mega Drive | HOME_ALONE.LZH | INDEPENDENT | | US 1992 EU 1992 AU 1992
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| Hyper Dunk: The Playoff Edition (Feb 2, 1994 prototype) | Sega Mega Drive | CEN-HYPD.LZH | CENSOR | | JP Mar 4, 1994 US Apr 1994 EU Mar 1994
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| Hyperion II (prototype) | Commodore 64 | HYPERION 2 -O-.PRG | ONSLAUGHT | | |
| Iketa (Vapour prototype) | Commodore 64 | VAPOUR PRV. [EX].PRG | EXCESS (EX) | | DE Dec 1994
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| Illgen (demo) | Commodore 64 | {{{origin_files}}} | ELITE | | DE Jan 1990
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| Illusion of Gaia (prototype) | SNES | NUM-GAIA.LZH | NUMBERS | | US Sep 1, 1994
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| Illusions (Commodore 64 prototype) | Commodore 64 | {{{origin_files}}} | | | |
| Inspector Gadget and the Circus of Fear (Beam Software intro) | Commodore 64 | {{{origin_files}}} | DEMOLITION | | |
| Inspector Gadget and the Circus of Fear (Beam Software prototype) | Commodore 64 | {{{origin_files}}} | Trianon | | |
| Into the Nature (Final build) | Commodore 64 | {{{origin_files}}} | ONSLAUGHT | | |
| Into the Nature (prototype) | Commodore 64 | {{{origin_files}}} | | | |
| Iron Commando (European prototype) | SNES | PDX-IRON.LZH | PARADOX | | JP Feb 10, 1995 EU Unreleased
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| Iron Hand (Commodore 64 prototype) | Commodore 64 | {{{origin_files}}} | NATO | | |
| Italian Night 1999 (Commodore 64 prototype) | Commodore 64 | {{{origin_files}}} | F4CG | | |
| Jackie Chan Adventures (Jul 19, 2004 prototype) | PlayStation 2 | jca-ggs | GGS | | EU Oct 1, 2004
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| Jim Power: The Lost Dimension in 3-D (Genesis prototype) | Sega Mega Drive | pdy-jpow.lzh | PRODIGY | | |
| Jim Power: The Lost Dimension in 3-D (SNES prototype) | SNES | PDX-JPOW.LZH | PARADOX | | US Dec 1993 EU Unreleased
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| Joe & Mac 2: Lost in the Tropics (FUCK prototype) | SNES | MF-JOE3.LHA | FUCK | | US 1994 JP Feb 18, 1994
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| Juiced (Jul 13, 2004 Acclaim Prototype) | Xbox | {{{origin_files}}} | SKY | | |
| Junker's High (Prototype A) | Sega Mega Drive | JUNKERS_HIGH | CENSOR | | JP Mar 26, 1993 US Mar 1993 EU Apr 1993
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| Justice League: Injustice for All (Prototype) | Game Boy Advance | eur-jlia.zip | Eurasia | | US Nov 18, 2002
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| Kaisertal: Fight the Necronis War (Prototype) | Game Boy Advance | asg-kais.zip | Asgard | | |
| Kawasaki Superbike Challenge (Prototype) | Sega Mega Drive | ATX-KAWA.LZH | ANTHROX | | US 1994 EU Apr 1995
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| Kevin Keegan's Player Manager (German prototype B) | SNES | PLAY-MAN.LZH | MAINMAN | | UK Nov 30, 1993 DE 1993
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| Kick Off 3: European Challenge (SABOTAGE prototype) | SNES | SBT-KCK3.LHA | SABOTAGE | | EU 1994
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| Kid Klown in Crazy Chase (Game Boy Advance prototype) | Game Boy Advance | trm-ccb.zip | Trashman | | EU Oct 21, 2002 US Oct 23, 2002
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| Kijin Kourinden Oni (prototype) | SNES | CF-SPONI.LZH | Cyber Force | | JP Aug 5, 1994
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| Killer Instinct (prototype) | SNES | KI-BETA.LZH | INDEPENDENT | | US Aug 30, 1995 EU Sep 21, 1995
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| Kingdom Under Fire: The Crusaders (Jul 6, 2004 prototype) | Xbox | {{{origin_files}}} | XB | | US Oct 12, 2004 EU Oct 29, 2004
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| Konami Krazy Racers (Prototype) | Game Boy Advance | mnc-kkrc | Menace | | JP Mar 21, 2001 US Jun 11, 2001 EU Jun 22, 2001
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| Koshimo (prototype A) | Commodore 64 | {{{origin_files}}} | Fatum | | |
| Koshimo (prototype B) | Commodore 64 | {{{origin_files}}} | Avantgarde | | |
| LEGO Racers 2 (Prototype) | Game Boy Advance | pcx-leg2 | Paracox | | US Nov 27, 2001 EU Dec 7, 2001
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| Lander (Feb 22, 1999 prototype) | PC | lander | DVNiSO | | EU 1999 US Jul 28, 1999
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| Landstalker: The Treasures of King Nole (Feb 24, 1993 prototype) | Sega Mega Drive | M-LSTLK.LZH | MAGICAL | | JP Oct 30, 1992 US Oct 1993 EU 1993
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