Unreleased Mega Drive games

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Over the course of the Sega Mega Drive's lifetime, a number of games went unreleased:

Name	Involved Companies	Details	ROM Found and Released?
AD2001/Power Ball AD2001	HiCom	Info on this page is all that's known.	No
Akira	THQ	Shown in Player One #44, Console Plus #44, and Console Plus #35. Cancelled for unknown reasons.	No
"Amegedon" Project	??	Info on this page is all that's known.	No
Bean Ball Benny	Nuvision	Cancelled when Nuvision went under. Lost Levels is known to have put up a CES flier for the game, but hasn't properly labelled it as such (TODO).	No
Beyond Zero Tolerance	Technopop	The sequel to Zero Tolerance. Cancelled when Technopop closed down. The copyright holders eventually released a prototype ROM to the Internet.	Yes
City Heroes	Samsung	All that's known comes from this Hardcore Gaming 101 article: Developed by the Uzu Keobukseon team and intended for international release; it was cancelled because the then-new South Korean game censorship laws were so confusing that they got lost trying to censor the otherwise completed game.	No
Converse Hardcore Hoops/Converse City Ball Tour	Virgin	Announced in GamePro #72 and CD Consoles #8. Cancelled for unknown reasons.	No
Cybernauts: The Next Breed	Accolade	Advertised by Accolade in the packages for some of their later games... and a lot of other places too. Cancelled along with Fireteam Rogue below because they were overmarketed to the point that there would be no realistic way to have the games completed the way they were advertised and still be fun — so new Accolade management dropped them.	No
Dando/Vasum	Treco	Advertised in magazines, but no actual info is known. (MAGAZINE SOURCE UNVERIFIED — TODO)	No
Devil Buster	SIMS	Shown in the April 1993 issue of Beep!.] Cancelled for unknown reasons.	No
DNAction: The New Breed	Accolade	[ Shown in Games World #1, Banzzai Magazine #21, GamePro #56, and Player One #4.] Cancelled for unknown reasons.	No
DynoBlaze	Bonsai, Virgin	A press release was released by Virgin, and is now mirrored on unseen64. Cancelled for unknown reasons.	No
Environmental Detective	Magicom	Shown in some issue of Mean Machine (TODO FIND OUT WHICH). Cancelled for unknown reasons.	No
Explode Star	NCS	The Japanese release of Trampoline Terror!. Cancelled for unknown reasons. Promotional fliers were distributed before the game was cancelled. (FLIER DISTRIBUTION METHOD UNVERIFIED — TODO)	No
Fire & Ice	Graftgold	Cancelled for unknown reasons.	No
Fireteam Rogue	Accolade	Advertised by Accolade in the packages for some of their later games... and a lot of other places too. Cancelled along with Cybernauts: The Next Breed above because they were overmarketed to the point that there would be no realistic way to have the games completed the way they were advertised and still be fun — so new Accolade management dropped them.	No
Flash Point	Sega	Cancelled for unknown reasons (presumably for the same reason Tetris was pulled from production after some copies had shipped).	Yes
Halloween Capsule	Softmax	Info on this page is all that's known. Cancelled for unknown reasons.	No
Hardcore	Digital Illusions, Psygnosis	Digital Illusions, now called DICE, had nearly completed the game when publisher Psygnosis cancelled it (and according to this linked video, taking every other unfinished MD game with it — was ResQ below a victim?). According to this linked video, which is of the game being showed by DICE to a demoparty in 2010, DICE were in talks with Sony (who owns Psygnosis, who still today owns the game's distribution license) to try to get the game released somehow — these appear to have gone nowhere.	No
It Came from the Desert	Cinemaware, Electronic Arts	Cinemaware released the prototype ROM. An interview with the lead programmer on the project reveals that the game was "99.99%" complete when cancelled and that it was cancelled because publisher Electronic Arts wanted to focus only on sports games from then on (that didn't happen).	Yes
Jester	STI	A rather elusive game; very little is known about it (though SOA did advertise it). Cancelled for unknown reasons.	No
Jim Power: The Arcade Game	Loriciel	Cancelled due to "financial troubles."	Yes (but is marked as a bad dump for unknown reasons)
Kartoon Kombat	Technos	A damaged prototype ROM is all that is known to survive of this game. Cancelled for unknown reasons. (MAGAZINE SOURCE ON UNSEEN64 PAGE UNVERIFIED — TODO)	No
Keeper of the Gates	Razorsoft	Supposedly a sequel to the MD version of Stormlord. Shown in EGM #40 and #41. Cancelled for unknown reasons.	No
Lobo	Ocean	Cancelled for unknown reasons. Found and dumped by SEGASaturno and released by drx.	Yes
Madness: House of Fun	Gremlin Graphics	Shown in Mean Machine #17 and Mega Force #17. Cancelled for unknown reasons.	No
Mission Impossible	Ocean	Developer unknown. Shown in Joypad #44, Top Consoles #4, and Console Plus #45. Cancelled for unknown reasons.	No
Monster Hunter	??	This Menacer game was only known to be shown in EGM #51.	No
Ninja Gaiden	Tecmo, Sega	Cancelled for unknown reasons.	Yes (but with hacked headers)
Pinky	Data Design Systems, Tengen	Advertised in magazines. Cancelled for unknown reasons (there are guesses as to what the reason is). (MAGAZINE SOURCE UNVERIFIED — TODO)	No
Pit Fighter II	Tengen	Shown in EGM #49. Cancelled for unknown reasons.	No
Popeye	Technos	Shown in Console Mania #28, Game Fun #94, and Mean Machine #17. Cancelled for unknown reasons.	No
Prince of Persia 2: The Shadow and the Flame	Broderbund	Cancelled for unknown reasons. Found by DreamTR, dumped by jurai, and released by drx.	Yes
ResQ	Tempest, Psygnosis	Cancelled for unknown reasons.	Yes
Road Riot 4WD	Tengen	Shown in Joypad magazine #7, EGM #40, and EGM #41. Cancelled for unknown reasons.	No
Slam: Shaq vs. the Legends	Tiburon	Released by drx.	Yes
Socks the Cat Rocks the Hill	Kaneko	Advertised in magazines. Cancelled for unknown reasons. (MAGAZINE SOURCE UNVERIFIED — TODO)	No
Speed Racer	Accolade	Advertised in magazines. Cancelled for unknown reasons. (MAGAZINE SOURCE UNVERIFIED — TODO)	No
Speedway Pro Challenge	Renovation Products	The planned American localization of Human's 1991 Mega Drive game Fastest 1. Cancelled for unknown reasons. Box scans exist.	No
Stone Protectors	Kemco, Eurocom, VIC Tokai	Cancelled for unknown reasons. Found, dumped, and released by The NES Player.	Yes
Swamp Thing	Microsmiths, Nuvision	Cancelled when Nuvision went under. Found, dumped, and released by MrMark0673 of SegaAge.	Yes (but overdumped)
X-Women: The Sinister Virus	?? (presumably Clockwork Tortoise)	Another X-Men license. A promotional video of unknown origin and a clip from EGM #89 are all that are known about the game. It was supposedly developed by Clockwork Tortoise.	No
Zombie High	Electronic Arts	Cancelled for unknown reasons.	Yes

Note: the Mega Drive Command & Conquer ROM, long believed to be an unreleased port, is actually an unfinished pirate.