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