The Dreamcast Unreleased Game List: Current State of Research

The Dreamcast Unreleased List: Current State of Research

From its conception to its premature demise, the Dreamcast was home to many games that would ultimately never see the light of day. Some of them even date back to the early stages of SEGA’s future console. One rumor in particular mentions a technical demo of San Francisco Rush being used as a showcase to promote 3dfx technology, before the Japanese company’s engineers ultimately opted for PowerVR.

For various reasons, often financial, many of these titles never made it beyond the conceptual stage. Others progressed further into development before being abandoned. Some nevertheless left behind playable prototypes, technical demos, Game Design Documents, or even asset archives. These remnants of a bygone era now allow us to trace their evolution, establish a timeline of their development, and, above all, glimpse their potential.

This article brings together, in alphabetical order, more than 25 years of research into Dreamcast Unreleased games, drawing on a variety of sources, some of which are contradictory. Some of the projects listed here were officially announced, while others remained confidential, with no public communication to confirm their existence to date.

In pink: Games playable by everyone, with an ISO available for download
In brown: Known playable prototypes, sometimes preserved by collectors, but not available for download
In red: Extensive documentation about the game on a dedicated page, but its prototype has not yet been unearthed
In purple: Scattered information about the project

If you have any previously unpublished information, photos or videos, development documents, prototypes, or personal accounts concerning any of these games, whether or not they appear on this list, please feel free to contact me.

Unreleased Games Featured in Gaming Magazines

1/4 RPG
10six (SegaSoft / SEGA)
3,000,000 RPG (FOG)
3D Fighter Maker (ASCII)
Agartha (No Cliché / SEGA)

The first release was made by Sega Dreamcast Info on January 15, followed by a second release in July 2021: a new build sourced from a Katana development kit. An article retraces the origins of Agartha’s development, featuring accounts from Frédérik Raynal, Didier Quentin, Didier Chanfray, and Philippe Vachay. Several artworks were also made available to the community by members of No Cliché. You can find more details about the game in this article: [Agartha Dreamcast and Its Prototypes: Discovering the Spiritual Successor to Alone in the Dark]

Age of Empires II: The Age of Kings (Ensemble Studios / Konami + SEGA)

« The development of Age of Empires on Dreamcast lasted a year and a half, and the game was functional on SEGA’s final console. The project was ultimately cancelled due to the machine’s hardware limitations: the game ran too slowly and required more memory. I remember that the Dreamcast was using 98% of its RAM as soon as the game started on a small randomly generated map. »

Research from: PC™ 2K21

Aiken's Artifact see Sanity - Aiken's Artifact
Akolyte
Alien Breed : Conflict
Alien Resurrection (Argonaut / Fox Interactive)

« Yes, I’m 99.4% sure that nothing happened. If anything did, it was limited to planning and artwork. »

Research from: PC™ 2K21

Anachronox (Ion Storm)

« Stories about Dreamcast ports of Deus Ex and Anachronox were circulating in 1999, but no work was ever done on a Dreamcast port of any of our games. »

Source : John Romero

Arcatera: The Dark Brotherhood (Westka Entertainment / Ubi Soft)

« Development on Dreamcast had not yet begun. »

Research from: PC™ 2K21

Armada 2: Exodus (Metro3D)

Armada 2: Exodus was initially developed for the Dreamcast, before being considered for Xbox, GameCube, and possibly even PlayStation 2. However, after more than four years of development at various stages of completion, the project was ultimately cancelled due to delays, successive overhauls, and limited resources. You can find more details about its development in this article: [Armada 2 and Dark Angel: Vampire Apocalypse on Dreamcast: Behind the Scenes of 2 Unreleased Games from Metro3D!!!]

Austin Powers: Mojo Rally (Take 2)
ALEX ~ Virus Composer (Media Factory)
Alexander: The Road to Percia (Media Factory / RocketStudio)
All-Star Baseball
Alugulate
Aqua Panic (SEGA)
Arena League Football: The 50 Yard Indoor War (Midway)
As Snow (SEGA)
Baldur's Gate (BioWare / SEGA)
Battle Zone II (Pandemic Studios)
Black & White (Lionhead Studios / Krisalis)

« If I remember correctly, development was already well underway: the physics and rendering engine were nearly finished, but the project was ultimately cancelled. »

« Yes, I believe it was playable, although I no longer remember what percentage of the game had been completed »

Research from: Sega Dreamcast Info

bleem! for Dreamcast: bleempak A (bleem!, LLC)
bleem! for Dreamcast: bleempak B (bleem!, LLC)
bleem! for Dreamcast: bleempak C (bleem!, LLC)
bleem! for Dreamcast: bleempak D (bleem!, LLC)
Boarder Zone (Housemarque / Infogrames)

The Bolo Museum, in Switzerland, has an asset disc for the game, although it cannot confirm that the resources it contains were intended for the Dreamcast version, despite the console being explicitly mentioned.

In December 2020, PC™ 2K21 received a VHS tape from a developer. He digitized it before publishing it on his YouTube channel.

BraveKnight
Buffy the Vampire Slayer

A Dreamcast and PlayStation adaptation was planned. Both versions were abandoned during development in order to focus on the original Xbox version. Development on Dreamcast was halted before the game had really begun to take shape.

Research from: Sega Dreamcast Info

Beach Spikers (AM2 / SEGA)
Blood of Zeon see Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu
Boku Yumei no Meijin (Fujicom)
Boku Yumei no Tatsujin (Fujicom)
Braveknight (Panther)
Castlevania: Resurrection (Konami USA)

The first release of a playable prototype was made by Sega Dreamcast Info on April 27. You can find more details about it in this article: [Castlevania: Resurrection (Dreamcast) – Discovering a Lost Legendary Prototype]

Castlevania-Resurrection-Dreamcast-Prototype

Chakan: The Forever Man (AndNow)

Videos of Chakan on Dreamcast have survived over the years. They were once available to watch on the website of AndNow, the development studio behind the project. They primarily consist of animation tests.

During the 2010s, a collector shared the contents of a Katana development kit with the community, containing a build of Chakan DC corresponding to the videos published on YouTube. Unfortunately, the executable required to launch the game is missing from the archive.

In 2024, Ed Annunziata also showed a Chakan Dreamcast beta burned onto a CD-R.

Research from: Sega Dreamcast Info

Colin McRae Rally 2.0 (Codemasters)

In 2017, fans of retro gaming and of Codemasters’ cult franchise learned of a Colin McRae Rally 2.0 demo running on the Dreamcast. Strangely, the prototype requires specific files stored on the VMU in order to launch. Unfortunately, the owner of the build is currently unable to share it on the Internet. The Dreamcast Junkyard website was nevertheless able to play it and took the opportunity to publish an article about it: [Colin McRae Rally 2.0 Revealed]

Four people made up the development team responsible for this Dreamcast adaptation. They reused the code from the PlayStation 2 version and ported it to SEGA’s console. The port was completed quickly, as the machine was relatively easy to work with, and the C code used on PlayStation 2 could easily be compiled for another platform. CMR2 Dreamcast ran at 60 fps most of the time, but if rendering a frame took more than 16 ms, frames were dropped and the game would then slow down to 30 fps. At this stage, the developers had not attempted to optimize it, but maintaining 60 fps would not have been a problem. Development of CMR2 on Dreamcast was limited to the known demo, which represented less than 10% of the final game.

Additional research by: Sega Dreamcast Info

Combat Flight Simulator see Microsoft Combat Flight Simulator

Commandos 2: Men of Courage (Pyro Studios / Eidos)

The first release of a playable prototype was made by Sega Dreamcast Info on xxxxxxxx (COMING SOON). You can find more details about it in this article: [Commandos 2: Men of Courage and Its Dreamcast Prototype: The Sequel to a Game That Left a Lasting Mark on the Industry]

Croc 2 (Argonaut / Fox Interactive)
Cut Away
Chi-Q no Tomodachi (NexTech)
Cho Hamaru Golf (SEGA)
Code Breaker
Crack 2 (Sieg)
Cryptonautes

« The game had barely moved beyond pre-production. We were passionate about the art direction and had only just begun creating the 3D assets and environments when the decision was made to cancel development. »

Research from: PC™ 2K21

D-Jump
Dark Angel: Vampire Apocalypse (Metro3D)

The Dreamcast version of Dark Angel was abandoned when SEGA withdrew from the console market. The game was eventually released on PlayStation 2. Both on SEGA’s final console and on PS2, the project encountered numerous problems that disrupted its already troubled development. You can find more details about its development in this article: [Armada 2 and Dark Angel: Vampire Apocalypse on Dreamcast: Behind the Scenes of 2 Unreleased Games from Metro3D!!!]

« When the Dreamcast version of Dark Angel was shown at E3 2000, if I remember correctly, it was only a playable demo of the first level. After leaving MetroPac, the Taiwanese subsidiary of Metro3D, in July 2000, the Dreamcast version was cancelled before becoming an entirely different game, titled Dark Angel: Vampire Apocalypse, developed exclusively for the PlayStation 2.

I did not study the design and gameplay of the PlayStation 2 version in detail, but it only reused the model of the main female character, Anna, from the original Dreamcast version. Although both versions were ARPG games, the controls, camera, level design, environments, enemy creatures, gameplay, artificial intelligence, and many other elements of the PS2 version were completely different from those of the Dreamcast version.

The development teams for the two versions were also different. The original Dreamcast version was developed entirely by the Taiwanese team, while the PS2 version was primarily developed by the American team. It also appears that the PS2 version of Dark Angel bore a striking resemblance to Metro3D’s first Dreamcast game, Armada, which had also been developed by the American team. »

Additional research by: PC™ 2K21

Dark Earth (Kalisto)
Deer Avenger (Hypnotix / Berkeley + Simon & Schuster)
Dee Dee Planet

The first leaked prototype of the game to be made publicly available online was released on June 15, 2021, thanks to research conducted by PC™ 2K21. You can find more details about it in this article: [Dee Dee Planet Beta Released!]

Years after the discovery of the first Dee Dee Planet beta, BANANABREAK found a second one on January 20, 2023. He subsequently shared it with the community: [Dee Dee Planet Dreamcast Found and Finally Playable]

Densha de Go! 3: Commuting (Taito)

Devil’s Den

Dragon's Crown

Drakan (Surreal Software / Psygnosis + GT Interactive)

DroneZ (Zetha GameZ)

Inspired by the movie Tron and the arcade game Discs of Tron, DroneZ began life as a Dreamcast project. However, Zetha GameZ, the Paris-based studio developing it, never received SEGA’s approval to release the game on the spiral-logo console.

« No, the Dreamcast version was not playable because we never received development kits from SEGA. »

Despite the blue hedgehog company’s refusal, the Zetha team did not give up. If the Dreamcast version was out of the question, there was always the PC and other home consoles!

« It was supposed to accompany the launch of the Nvidia GeForce 3, and we released a PC benchmark called DronezMark, based on the game. We also released the game on Xbox, but only in Japan… »

Originally, the creators of DroneZ had attracted the attention of several companies after winning an award at the Mekka/Symposium, an important Demoscene competition held in Germany. French investors, including one who was a huge fan of Discs of Tron, then contacted the winning team, which subsequently joined Zetha GameZ.

« We also had discussions with DEC, which was developing a graphics card based on an Alpha processor »

The team, consisting of around ten people, later moved to Benevento, Italy, to focus fully on the PC and Xbox versions of DroneZ. They eventually founded their own studio, SpinVector.

« That wasn't a very good idea either. Italian bureaucracy wastes an enormous amount of time, and it was even worse back then than it is today. »

Research from: Sega Dreamcast Info

Dynamite Robo (Warashi)
Dark Eyes (NexTech)
Daytona USA 3 (SEGA)
Dogs of War (Silicon Dreams / Take 2)

« There isn’t much to say about the Dreamcast version. We were working on the Matrix card version of the game, and I think we made an OEM version with them. I had the Dreamcast development kit on my desk. The best we ever managed to do was play Sega Rally on it.

The game went through several names. Warmonkeys was the second one. There was another name before that, but I don't remember it. It was a very different concept, based on breeding animals that the player could then make fight each other. It was called Starship Soldiers in Germany.

The plan was to develop the PC version first and then port the game to the Dreamcast. »

Research from: PC™ 2K21

Dousoukai Again (NEC InterChannel)
Dynamic Golf (Wow Entertainment / SEGA)
Dynamite Baseball (AM1 / SEGA)
Ecco 2 Sentinels of Universe (Apaloosa Interactive)

The first release of a playable prototype was made by Hidden Palace on June 21, 2016. You can find more details about it in this article: [Ecco II: Sentinels of the Universe (Feb 19, 2001 Prototype)]

After acquiring an Appaloosa Katana development kit in 2020, Sega Dreamcast Info subsequently shared two new builds of the game. You can find more details about them in this article: [Ecco II: Sentinels of the Universe and Its Prototypes: When SEGA’s Most Famous Dolphin Was Set to Return to the Dreamcast’s Virtual Aquarium for a Sequel]

During the 2020s, Mihály Sáránszki, the game's level designer and graphic artist, revealed a more advanced beta of Ecco II in a video, running with the development studio's level editor. It featured previously unseen maps as well as artworks that had never been seen before. He did not stop there, subsequently showing a technical demo of an Unreleased Dreamcast game titled Mermaid, which was very close to the world of Ecco on Dreamcast, and can be viewed below.

ESPN Baseball Tonight (Konami)
ESPN Links Golf (Microsoft + Konami)
European PGA
Extreme-G X (Acclaim Studios London)
F1 Grand Prix 4 see Geoff Crammond's Grand Prix 3 - 2000 Season
Far Nation (SEGA)

Although the community cannot play it yet, Joe Cain surprised everyone by revealing Farnation running on the Dreamcast in a video. This Unreleased is of historical significance, as it demonstrates SEGA’s intention to bring the MMO genre to its final console. You can find more details about it in this article: [The Discovery of Farnation Dreamcast in Video: When SEGA Wanted to Bring MMOs to Its Final Console]

Felony Pursuit

Polygon Studio, a company based in Paris, was developing an open-world racing game for THQ. You can find more details about it in this article: [Felony Pursuit Dreamcast: A Racing Game That Couldn’t Find Its Way Through the Heavy Traffic of Dreamcast Releases]

Final Fight Revenge (Capcom)
Fortress: The Evolution (Pipe Dream / Majesco)
Fortris
Frontier (Turbine Entertainment / SEGA)

Frontier, yet another MMO Unreleased for the Dreamcast, clearly demonstrates the direction SEGA wanted to take with the online capabilities of its final console. You can find more details about it in this article: [The Discovery of Farnation Dreamcast in Video: When SEGA Wanted to Bring MMOs to Its Final Console]

Fighter Maker see 3D Fighter Maker
Flagship
Flintstones: Viva Rock Vegas

The first leak of a playable prototype of The Flintstones in Viva Rock Vegas on Dreamcast was made by SegaMax in 2005, probably the White Label version (no source reference is currently available).

On September 18, 2020, Sega Dreamcast Info subsequently shared an earlier beta of the game with the community, in GD-R (Gigabyte Disc Recordable) format. You can find more details about it in this article: [The Memories of The Flintstones in Viva Rock Vegas Dreamcast (Its Prototypes and White Label)]

Flinstones-Viva-Rock-Vegas-Dreamcast-Prototype

Flying Dragon see SD Legend of the Flying Dragon EX
Fortris (Promethean)
Friend of Earth (NexTech)
Galleon (Confounding Factor / Interplay)

It turns out that the source code for every version of Galleon, including the Dreamcast version, was reportedly archived by a former Confounding Factor employee. On Dreamcast, the game had reached a playable and explorable state.

Research from: Godfather God 98

Geist Force (SEGA of America + Netter Digital Entertainment / SEGA)

In 2012, amateur archivists from the former ASSEMblergames website discovered a Geist Force prototype for Dreamcast and made it available to fans of SEGA’s final console. It was provided on a CD-I, an unconventional format for the Dreamcast, whose standard format is GD-I (no source reference is currently available, as the website has since disappeared).

Sega Dreamcast Info shared the first GD-I of the game on September 27, 2021, followed, five years later, on March 29, 2026, by a new prototype version of the game. You can find more details about it in this article: [Geist Force Dreamcast and Its Prototypes: Exploring the Heart of the Milky Way]

Geoff Crammond's Grand Prix 3 - 2000 Season (Microprose / Infogrames +Hasbro)
Gex 3: Deep Cover Gecko (Crystal Dynamics / Eidos)
Giants: Citizen Kabuto (Planet Moon Studios / Interplay)
Glover 2 (Interactive Studios / Hasbro)
Gold and Glory: The Road to El Dorado (Ubi Soft)
GorkaMorka (Real Sports / Ripcord)
Grand Prix 4 see Geoff Crammond's Grand Prix 3 - 2000 Season
Gun Valkyrie (Smilebit / SEGA)

« No prototype version was tested by Sega of America. If a beta version existed, the game never made it outside Japan. »

Source: a former SEGA of America employee

Half-Life for Dreamcast (Gearbox + Captivation Digital Laboratories / Sierra)

Although Half-Life on Dreamcast reached players’ consoles as early as the turn of the millennium, it was an ISO modified to run in CD-I format. It was not until August 29, 2018, that a GD-I prototype was released on the Internet by Sega Dreamcast Info. he situation subsequently changed, as two other builds of the game from Valve, Sierra, Gearbox, and Captivation were also shared by Sega Dreamcast Info, along with the contents of a Katana development kit used during its development. You can find more details about it in this article: [Half-Life, the FPS That Never Got the Chance to Live on Dreamcast!]

Half-Life Online (Gearbox + Captivation Digital Laboratories / Sierra)

« I remember playing multiplayer matches of Half-Life on the Dreamcast during testing. I don't remember any other details beyond the fact that ‘it worked.’ I had played an early build, but it was different from the original HL DC version. It’s possible that I was playing in a sort of LAN mode that served as a precursor to testing whether matchmaking could work over the Dreamcast network. »

Source: Jeff Pobst

Hamunaptra see The Mummy
Halo(TBA / Bungie)
Harukaze Sentai V Force 2 (Bing Kids)
Hype: The Time Quest (Ubi Soft)
Hamster Story (Culture Brain)
Heavy Metal F.A.K.K. 2 (Ritual / G.O.D.)
Hellgate (Jester Interactive)

The date and contributor responsible for the release of the Hellgate prototype remain unknown. The Dreamcast Junkyard website reported on the discovery on this page: [Another canceled Dreamcast game leaked!]

Heroes of Might & Magic III (3DO / Ubi Soft)

Long held by Spanish collector Fataliste, the Heroes of Might & Magic III prototype was finally made available on March 28, 2020, on the [Prototopia] forum.

Hot Wheels: Stunt Track Driver 2
Hiryu-no Ken Retsuden (Culture Brain)
The House of the Dead 3 (SEGA)
Independence War 2: Edge of Chaos (Particle Systems / Infogrames)

« The Dreamcast version was cancelled by Infogrames, as the publisher did not believe that making an additional investment to create a console-specific interface was worthwhile. As for the software itself, we had assessed the feasibility of the title on Dreamcast and got the core of the graphics engine running »

Research from: PC™ 2K21

IHRA Drag Racing (Bethesda Softworks)
Innocent Tears (Kobi / Global A)
Internet Game Pack

Internet Game Pack, a compilation of mini-games designed for online multiplayer, leaked onto the Internet on March 11, 2019. Drx from Hidden Palace shared its ISO on this page: [Internet Game Pack (Feb 28, 2001 prototype)]

Iris Angel (Japan Corporation)
Jet Set Radio Future (Smilebit / SEGA)
Jump Runner (Glass Ghost)
Jambo Safari + Emergency Call Ambulance + Brave Fire Fighters (SEGA)
Jarman 2 (Visit / Bidget)
Jissen Pachi-Slot Hisshouhou! @VPACHI Kingdom (MaxBet)
Kleaners

« We prototyped Kleaners on Dreamcast, which eventually became SWAT: Global Strike Team on Xbox and PlayStation 2. »

Research from: PC™ 2K21

K1 Dream (Xing)
Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu (Bandai)

Knights

« It was a long time ago, but if I remember correctly, we initially targeted the Dreamcast. I attended a Dreamcast dev-con in Brighton for that purpose. However, I don't know whether a formal agreement for the console was ever signed.

Since the game changed publishers several times and its development stretched over a long period, the target platforms also changed several times. When it was cancelled, it was intended for PC and PlayStation 2, as far as I know. I don't remember whether we actually got it running on Dreamcast. I do remember studying the console's graphics hardware and using PowerVR graphics cards on PC in an attempt to replicate its configuration. I don't think we made much progress with the Dreamcast version, since we had already got the entire engine running on the target hardware. »

« I'm not sure I remember it being on Dreamcast, but aside from the introductory and tutorial island, along with a few playable animations, there wasn't much that had been completed. »

Research from: PC™ 2K21

Kriskrew (Dragonydre)

Although this game, developed by a group of enthusiasts, never reached the playable demo stage, a substantial archive containing music, story elements, and rendering tests was discovered by Sega Dreamcast Info on April 19, 2021, and promptly made available online. You can find more details about it in this article: [KYSKREW: The Forgotten Dreamcast Cancelled Game]

Kurt Warner's Arena Football

« The artwork was already at the correct resolutions, as were the animations. If I remember correctly, the game was also running fairly stably. I think the company wanted Blitz to become a Dreamcast game, and Kurt Warner’s Arena Football was essentially a reskin of Blitz. »

Research from: PC™ 2K21

Last Bronx 2 (SEGA)
La Femme Nikita
Legacy of Kain: Soul Reaver 2 (Crystal Dynamics / Eidos)
Legend of the Blade Masters (Ronin / Ripcord)

Publisher Ripcord Games was backing Legend of the Blademasters, a game developed by Ronin Entertainment that was scheduled for release in 2001. Following the publisher’s bankruptcy in March or April 2001, the project was ultimately cancelled.

Although the game was finished, or very close to completion, Ronin Entertainment was never able to save it by finding a new publisher. SEGA’s announcement that it was discontinuing production of the Dreamcast did nothing to improve the situation either. Another game with a cruel fate.

« The team was fairly small and worked on it for several years, I think. »

Twenty-five years after its cancellation, the studio’s founder appears to have retained this anime-inspired fantasy RPG.

Research from: Sega Dreamcast Info

Links LS see ESPN Links Golf
Little Dream
The Legend of the Nibelungen see The Ring of the Nibelungen
Let's Make a Monster see Monster wo Tsukurou!
LiltherB: Real Herb (Takuyo)
Love Mahjong - Melty School (Culture Brain)
Major League Soccer (Konami)
Max Payne (Remedy / Rockstar / Take 2)

« My friend worked at Remedy. He told me that the game only ran on PC hardware and that nothing had been done on the Dreamcast. »

Research from:: Jackalus sur ASSEMblergames

Messiah (Shiny / Interplay)
Metal Max Overdrive (ASCII)
Metal Max Wild Eyes (ASCII)
Microsoft Combat Flight Simulator (Microsoft + Konami)

Psycho leaked several builds of the game on August 9, 2019, on the [Prototopia] forum.

Microsoft Links LS see ESPN Links Golf

Midnight GT (Rage)

Missile Command 3D (Hasbro)

Mojo Rally see Austin Powers: Mojo Rally

Monster Breed

On February 2, 2022, Japanese collector ナンブ寛永 (古本の南部堂) posted photos of concept materials for Monster Breed Dreamcast on his Twitter (X) feed.

Monster Truck (Konami)
The Mummy (Rebellion + Konami / Fox Interactive)
Midway's Greatest Arcade Hits Volume 3 (Midway)
Mobile Suit Gundam: Blood of Zeon see Kidou Senshi Gundam: Giren no...
Monster wo Tsukurou! (SEGA)
Monster Racer
Music Box (FOG)
New Worlds see Star Trek: New Worlds
Nijiiro Tenshi (Japan Corporation)
Outcast (Appeal / Infogrames)

« I would like to take this opportunity to confirm that development of Outcast on Dreamcast had not begun. The reason was that the PS2 had emerged as the leading platform on the market by the time the developers were about to start working on the port. »

According to a source attributed to Rollon de Tressaille, however, the reason for the cancellation was different: « After various tests, the game was too demanding for the Dreamcast to run. The problem was that the title used vectors for its 3D graphics, which allowed for enormous maps. In terms of processing requirements, it was complicated. »

Ohzumo (Bottom Up)
Over the Top Soccer (Visual Concepts)

With Over The Top Soccer, SEGA wanted to compete with EA and its FIFA series in the European football market. However, the company never obtained the necessary license. On December 29, 2025, Sega Dreamcast Info acquired a technical demo of the game. You can find more details about it in this article: [Over The Top Soccer Dreamcast and Its Prototype: When SEGA Considered Creating Its Own FIFA or Soccer 2K2]

Pachinko no Dendou: CR Nanashi (Microcabin)
Panzer Dragoon Orta
PBA Tour Bowling 2001 (Bethesda Softworks)

The date and contributor responsible for the release of this bowling game remain unknown. Its ISO is archived on this page: [PBA Bowling 2001 (Jan 17, 2001 Prototype)]

Picassio (Promethean)

« Picassio never went beyond a scripted sequence created in the graphics engine. There was never really a game, just the concept on paper and a sequence produced by the art team. »

Research from: PC™ 2K21

Princess Maker 4 (Gainax)
Prism Heart (Kid)
Project Propeller Online see Propeller Arena Online: Aviation Battle Championship (AM2 / SEGA)

Propeller Arena reached players in the early 2000s, but, as was often the case at the time, in CD-I format. A prototype acquired by Sega Dreamcast Info was leaked online in GD-I format on August 25, 2021. This was followed, again thanks to the same contributor, by six additional versions of the game, including one showcased at E3 and several early Blockout builds. You can find more details about it in this article: [Seven New Propeller Arena Dreamcast Prototypes Take Flight]

The Planet of the Apes (Visiware / Fox Interactive)

Development of the Dreamcast version reached a playable stage, with only a few levels completed. You can find more details about it in this article: [Planet of the Apes Dreamcast Crashes onto the Planet of Unreleased Games]

Quest of the Blade Masters (Ripcord)
Quark (Quantic Dream)
Redline Arena

« While we were working on Redline for PC, Sega became interested in a customized version for the Dreamcast. We had the early development kits, and the Redline engine was up and running within a few weeks. Visually, the result was really convincing and maintained a stable frame rate. Redline Arena was a multiplayer arena combat game, featuring battles both on foot and in vehicles. The single-player mode was based on progression through bosses and clans. We worked on various aspects of the project for three to four months, but our publisher, Accolade, was unable to secure what it considered a fair price, and development was suspended. Unfortunately, I kept neither the original screenshots nor any discs. We also worked for a while with another developer to help them port the engine, before they went on to found Secret Level. »

Research from: PC™ 2K21

Retupu
Renegade Racers

« We made a Dreamcast version based on the PC version, which was finished, but the publisher decided not to release it due to poor sales projections for the Dreamcast. The Dreamcast version featured great 1-bit animations on the VMU. Everything was complete. We had even passed the early stages of certification, with features that we considered revolutionary at the time, including online leaderboards! Interplay had decided that producing and promoting the game was not financially worthwhile. »

Research from: PC™ 2K21

Resurrection
Rings (Konami)
The Road to El Dorado see Gold and Glory: The Road to El Dorado
Roswell Conspiracy Theories (Crawfish / Red Storm)

« I also briefly worked on Roswell Conspiracies, which was a PC and Dreamcast game based on a television cartoon. I don't think the game was ever released. I don't know how far Roswell got in development. I left Red Lemon while it was still in pre-production. »

Research from: Sega Dreamcast Info

Ring Age (Takuyo)
Ring The Legend Of The Nibelungen (Success)

The release of Ring: The Legend of the Nibelungen spanned five years, as it took that long to recover all three discs of the game. Finally, on August 25, 2026, Sega Dreamcast Info found the last missing GD-ROM, making it possible to reconstruct the game in its entirety. You can find more details about it in this article: [Ring: The Legend of The Nibelungen – The Dreamcast Prototype Unearthed]

Prototype-Katana-Ring-The-Legend-Of-The-Nibelungen

Sanity - Aiken's Artifact (Monolith / Fox Interactive)
Scud Race (Tech demo)

Scud Race on Dreamcast is a technical demo included in the SDK for the SET 2 development kits, a graphics card for PC that predates the SET 5. To run it on PC, as it did at the time, Sifting created a Kamui wrapper, essentially an emulator that reproduces its functionality without requiring a SET 2. You can find more details about it in this article: [Scud Race Dreamcast: The Unearthed Technical Demo]

Severance: Blade of Darkness

Shadowman: 2econd Coming (Iguana / Acclaim)
Shienryu 2 (Warashi)
Shiken - Evenstar
Shrapnel: Urban Warfare 2025 (Zombie / Ripcord)
Sierra Sports: Game Room (Sierra)
Sim City 3000 (Maxis)
Skies (Paradigm / SegaSoft)

« Development never progressed far enough for it to be considered a real game before SegaSoft was shut down. We hadn’t even assembled a dedicated development team, as the project was still at a very early stage. Concept artwork was being created, and some basic 3D movement sequences were already being developed in software. »

Research from: PC™ 2K21

Sonic & Knuckles RPG (SEGA)
Soul Reaver 2 see Legacy of Kain: Soul Reaver 2

A video recording of the demo shown at E3 still exists, unfortunately in poor quality.

South Park: Deeply Impacted (Iguana / Acclaim)
Star Trek: New Worlds (Binary Asylum + RuneCraft / Interplay)

Source code for the game surfaced in 2021. According to its owner, it may be related to the Dreamcast version. You can download it by visiting this website: [Star Trek: New Worlds Source Code]

« It was Interplay that was supposed to publish the Dreamcast version. I think it was probably close to release. I assume the company’s disastrous financial situation led it to simply abandon most of its console titles in order to focus on its PC games. »

Research from: dreamcastcollector

Star Wars: Super Bombad Racing (Lucas Learning / LucasArts)
Substance
Supreme Snowboarding see Boarder Zone
SWAT 3: Close Quarters Battle (Sierra)
System Shock 2 (Looking Glass Studios / Vatical Entertainment)
Scooby Doo
SD Legend of the Flying Dragon EX (Culture Brain)
SEGA Worldwide Soccer 2001 (SEGA)
SEGA GT 2002
Sekai Fushigi Hakken! Troya
Sentimental Prelude (NEC InterChannel)
Shin Honkaku Hanafuda
Shinobi (SEGA)

Skies
Sosei
Star Trek: New Worlds (Runecraft, Virgin)

Star Wars: Super Bombad Racing

« I think there was a playable version, even if it was fairly rudimentary. I remember being disappointed when it was cancelled. I believe the reason was that the Dreamcast installed base was too small and that the cost of the port would have been too high. »

Research from: PC™ 2K21

Street of Rage 4

A pitch for Streets of Rage 4 on Dreamcast exists in video form on YouTube. The project was not well received when it was presented to SEGA of America. Perhaps the first-person perspective applied to a beat ’em up was simply too innovative for its time.

Super Monkey Ball (Amusement Vision / SEGA)
Take the Bullet (Red Lemon / SEGA)

The first release of the game from a Katana development kit was made by Spreak on January 7, 2021, and was later shared with an optimized prototype by the community on the Dreamcast-Talk forum: [Take the Bullet (Unreleased 2020) Link + Cover]

In XXXXXXX (Coming Soon), Sega Dreamcast Info shared two new versions of the game, the oldest and most recent known builds to date, both first discovered on physical discs. You can find more details about it in this article: [The Origins of Red Lemon Studios and Its Games: Take The Bullet, Its Most Famous Title]

TD Cycles (Tech Demo)

Another Unreleased that Fataliste had carefully preserved in his collection for many years. On July 20, 2020, he finally decided to share its ISO with members of the Dreamcast community. Download it here: [Test Drive Cycles (May 17, 2000 prototype)]

Ten6 see 10six
Test Drive Cycles
Test Drive Off-Road 3
Thunder Force VI (Tecnosoft)
Time Crisis 2 (Namco)
Total Annihilation 2 (Cavedog / GT Interactive)

Totem

After several years of research and discussions with developers, Sega Dreamcast Info dedicated an article to Totem and ALPHA Dreamcast, bringing the two projects together on the same page. You can find more details about them in this article: [The French development studio Kalisto and Its 2 Cancelled Projects “Totem” and “ALPHA”, 2 Games Planned for Dreamcast]

Trespasser (DreamWorks)
Trinity
Tropico (PopTop / G.O.D.)
Turok 2: Seeds of Evil (Iguana US / Acclaim)
Tako no Marine (Microcabin)
Thunderboats (Perception)
Title Defense
Toe Jam & Earl III

After purchasing a Katana development kit, ZakhooiTM discovered a working version of ToeJam & Earl III: Mission to Earth for Dreamcast inside it. Hidden Palace archived its ISO in CD-I format on its website: [ToeJam & Earl III: Mission to Earth (Jul 2, 2001 prototype)]

As part of a preservation project dedicated to Visual Concepts prototype games, ZakhooiTM provided Sega Dreamcast Info with a disk image from the Katana development kit’s hard drive containing this Unreleased for the first time. The game is now also available in GD-I format. You can find more details about it in this article: [ToeJam & Earl III: Mission to Earth and Its Prototypes: When the Funk Came to Dreamcast and Xbox]

Tokyo Bus Guide: From Today, You're Also the Driver (Fortyfive)
Tooncar
Top of the Formula Racing (Fujicom)
Trip Trap (Caramel Pot)
Troya see Sekai Fushigi Hakken! Troya
Type X: Spiral Nightmare (SEGA)
UEFA Striker 2001 see UEFA Striker Millennium
UFC: Tapout see Ultimate Fighting Championship: Tapout
Ultimate Fighting Championship: Tapout (Crave)
Unreal (GT Interactive)
V Force 2 see Harukaze Sentai V Force 2
V.I.P. (Kalisto / Ubi Soft)
Virtua Striker 3 (Amusement Vision / SEGA)
VR Baseball 2000
VR Football
VR Hockey
Victory Goal 2001 (SEGA)
Virtua Golf (Wow Entertainment / SEGA)
Virtual Pool 3 featuring Jeanette Lee
Viva Rock Vegas see Flintstones: Viva Rock Vegas
Viva Soccer (Interplay)
Warzone 2100 (Pumpkin Studios / Eidos)
Wave Runner (SEGA)

The Wave Runner prototype for Dreamcast has been located, and its owner is known. Unfortunately, they are not yet able to share it with the community.

Whiplash 2
Wild Water World Championships see Renegade Racers
Wipeout (Psygnosis Liverpool Studio)
The World's Scariest Police Chases: Deadly Pursuit (Teeny Weeny Games / Fox
Interactive)

The World's Scariest Police Chases: Deadly Pursuit on Dreamcast could have been one of the pioneers of open-world racing games. Development had reached the playable stage. You can find more details about it in this article: [World's Scariest Police Chases: Deadly Pursuit: The Teeny Weeny Games Unreleased That Escaped the Dreamcast]

The-World-Scariest-Police-Chaces-Deadly-Pursuit

Unreleased-Dreamcast-Version-Deadly-Pursuit

Worms Pinball (Team 17 / Infogrames)

Located for many years but never shared, the Worms Pinball prototype was finally offered to Sega Dreamcast Info on February 11, 2023, allowing it to be shared with the community after more than ten years of waiting to finally play it! You can find more details about it in this article: [Worms Pinball, or When the Dreamcast Tilts!]

Warmonkeys see Dogs of War

Woody Woodpecker Racing (Konami / Universal Interactive)

The first discovery of this Mario Kart-like game came in the form of a video, before an intermediate version of Woody Woodpecker Racing on Dreamcast was made available a few months or years later, after being found in a development kit. You can find more details about it on this blog: [The Release of Woody Woodpecker Racing DC: When a Mario Kart-Like Wanted to Join the Dreamcast]

World Discovery Troya see Sekai Fushigi Hakken! Troya

World’s Scariest Police Chases

WWW;Soccer (Clean Fight)

Xena: Warrior Princess

Zeman Mahjong

Zeon no Keifu see Kidou Senshi Gundam: Giren no Yabou - Zeon no Keifu

Les Unreleased jamais annoncé

Official Megadrive Emulator for Dreamcast

Long considered to be nothing more than a rumor, the official Mega Drive emulator for Dreamcast was eventually unearthed by Sega Dreamcast Info, confirming that the project did indeed exist. You can find more details about it in this article: [The Official Mega Drive Emulator for Dreamcast]

Deer Avenger 3

Appearing on eBay in the late 2010s, no one knows who won the auction. Even Adam Koralik, who was able to access it to make a video, doesn’t remember!

The Simpsons Bug Squad

When Spreak purchased a Katana development kit that had belonged to Red Lemon, the same one that contained Take The Bullet Dreamcast, he did not expect to also discover a technical demo of The Simpsons: Bug Squad on Dreamcast. He shared his discovery on the Dreamcast-Talk forum on January 10, 2017, making it available to the community: [Dreamcast Katana Files]

Millenium Racer

Still buried within the contents of a Katana development kit, Kurinin84 released Millennium Racer, an Unreleased game by Cryo Entertainment, which Japanese-Cake then fixed to make it playable. JC took the opportunity to share the game’s ISO on his website: [Remember boys, no points for second place!]

Monopoly et Scrable

« I think we had very early versions of Monopoly and Scrabble running. They were barely playable. I don't know why they were cancelled. I suspect Hasbro had approached Runecraft to handle the ports to Dreamcast. We were asked to take a look at them and start the porting process, but at some point, Hasbro or Runecraft decided not to finalize the contract, and the games were cancelled. It wasn't due to technical issues, but perhaps financial considerations. »

Research from: Sega Dreamcast Info

Mort the Chicken

A build of Mort the Chicken Dreamcast, unfortunately missing its executable, was found in the same Katana development kit that contained Chakan Dreamcast.

Stampede

In addition to Giant Killer on Dreamcast, an exclusive release available only in the United Kingdom, Io Production also planned to release Stampede on SEGA’s console on behalf of Infogrames. You can find more details about it in this article: [Stampede on Dreamcast and PC: The Unreleased Game That Was Supposed to Let Us Experience Life as a Shepherd]

The Smurfs

Mihály Sáránszki, a former Appaloosa developer, revealed in a video that the Hungarian studio was secretly working on Dreamcast and PlayStation 2 versions of The Smurfs. You can find more details about them in this article: [Appaloosa’s Secret Projects: The Smurfs Dreamcast/PlayStation 2 Revealed in Video and the Parrot Project in Artwork]

AlphaClone One

Also known as Alpha, this Dreamcast game by Kalisto went through a troubled development before ultimately being cancelled. You can find more details about it in this article: [The French Development Studio Kalisto and Its 2 Cancelled Projects “Totem” and “ALPHA”, 2 Games Planned for Dreamcast]

Riders

Technically, Riders Dreamcast is not really a cancelled game, but rather a pitch created by Eden Studios to secure funding from Infogrames. You can find more details about it by reading this blog: [Riders, a Cancelled Project by Eden Studios]

Deer Hunter

Deer Hunter, which Dear Avenger parodies, had reached the playable stage. However, many months of development were still needed to complete the game. You can find more details about it in this article: [Deer Hunter: The Hunt Was Supposed to Begin on Dreamcast!]

Paris-Dakar (SoftBank)

It came too late in the console’s life cycle. The project, which remained at the technical demo stage, was never publicly announced.

Research from: Sega Dreamcast Info

Un jeu de motocross (THQ)

It came too late in the console’s life cycle. The project, which remained at the technical demo stage, was never publicly announced.

Research from: Sega Dreamcast Info

Jekyll and Hyde (In Utero)

By sheer coincidence, Sega Dreamcast Info unknowingly acquired prototypes of Jekyll & Hyde on Dreamcast, a port of the game of the same name released on PC. You can find more details about it in this article: [Jekyll & Hyde: The Split Personality, From PC to Dreamcast]

In Cold Blood

« I tested the feasibility of porting In Cold Blood to DC from the PS1 version, and of course, it was feasible, but the market simply wasn’t there. Work on the port was stopped because the publisher declined to go ahead with it. »

Research from: Sega Dreamcast Info

Broken Sword 3: The Sleeping Dragon

« It was technically too difficult to do, especially since the Dreamcast market had already declined. In other words, the port would have been possible, but the amount of work required made it commercially unviable. I used the SET 2 to carry out the initial performance tests, then the SET 4 to port larger portions of the engine and test memory usage. »

Research from: Sega Dreamcast Info

GTA 3

The Dreamcast version of GTA III was ultimately abandoned in favor of the PlayStation 2 for commercial reasons. Development on SEGA’s 128-bit console lasted four months. During that time, the developers created a short technical demo on Dreamcast, featuring a character moving through an environment.

Research from: Sega Dreamcast Info

Fantasy Prototype

Fantasy Prototype is a Proof of Concept created by Visual Concepts. This term reflects the true definition of the word “prototype”, which is sometimes misused by the general public in the video game industry. Those curious enough can try this demo, which is part of a preservation project launched by Sega Dreamcast Info on December 29, 2025, bringing together the majority of Visual Concepts’ Dreamcast titles in their non-final forms. You can find more details about it in this article: [Fantasy Prototype Dreamcast: The True Definition of a Video Game Prototype with This Visual Concepts Proof of Concept]

Traveller: Space Lords

Traveller: Space Lords on Dreamcast is a video game adaptation of the Traveller franchise, best known among fans of science-fiction role-playing games.

« It’s a shame that the Dreamcast was discontinued. I would have liked to be able to finish the game. »

The Dreamcast version was not very far along. The developers at Fenris Wolf had reached a functional demo, but it was still too rudimentary to be truly playable.

Research from: Sega Dreamcast Info

Shinobi Dreamcast (Looking Glass Studios Proposal)

In secret, Looking Glass Studios worked for three or four months on a 3D version of Shinobi targeted for the Dreamcast. The development team wrote a story, created manga-style artwork, including pieces by Dan Matanski, and produced the beginnings of a pre-rendered introduction video. This gave them a preliminary foundation to present and discuss with SEGA...

« Looking Glass Studios in Washington State — a satellite studio of the other studio located on the East Coast that had worked on System Shock 2 — ceased operations at the end of 1999, before the game was officially signed or completed »

If the Japanese company rejected the proposal, the studio planned to rework the Shinobi concept into an entirely new franchise, in the style of Thief. It would have been titled Ninja: The Dark Arts.

Several years later, Overworks eventually developed its own Shinobi under SEGA. Development began on the Dreamcast before being transferred to the PlayStation 2.

Research from: Sega Dreamcast Info

Thingumajig

This Thingumajig prototype, released online by Sega Dreamcast Info on May 23, 2026, represents what the industry calls a Vertical Slice: a short, highly polished section of a game designed to convince a publisher to fund the project. Developed by Polygon Studio, the same team behind Felony Pursuit Dreamcast, the game was being considered by SEGA for an exclusive Dreamcast release. The Japanese company ultimately backed out just days before the contract with the French studio was due to be signed. You can find more details about it in this article: [Thingumajig 3DFX and Its Demo: Polygon Studio’s Intimate Dreamcast Project That SEGA Considered Publishing]

Bad Mojo

« The Dreamcast version was never completed or released. There isn’t much to say about it, other than the fact that the project ultimately went nowhere! It wasn’t playable. Basically, I was rewriting it on PC when the project was cancelled before it ever worked on the Dreamcast. »

Research from: Sega Dreamcast Info

Sidhe

« The game was originally planned for the Dreamcast. During production, it had to be adapted for the PlayStation 2, for which we had just received the development kits.

The GameCube and Xbox versions mentioned by the website (Unseen 64) were only intended as potential ports, since the Xbox kits arrived around the time I left, and Kalisto went out of business before or around the release of those consoles. »

Research from: Sega Dreamcast Info

Games Cancelled in Certain Regions Only

4 x 4 Evolution PAL

Release of the cancelled European version of 4x4 Evolution on Dreamcast, made by Sega Dreamcast Info in 2018. You can find more details about it in this article: [4 x 4 Evolution PAL Dreamcast]

Shenmue 2 US

SEGA of America cancelled the release of Shenmue II in the United States at the last minute. This discovery by Sega Dreamcast Info proves that development of its American localization was already well advanced. You can find more details about it in this article: [Shenmue II (US) V0.991 (Sep. 14, 2001 Prototype): From Its Cancellation to Its Discovery]

The Ginch JP

Release of the Japanese version by Sega Dreamcast Info on October 3, 2022. You can find more details about it in this article: [The Grinch on Dreamcast: Prototypes of the Unreleased Japanese Version in Time for Christmas!]

Unreleased-The-Grinch-Dreamcast-japanese-prototype

Unreleased-Japane-Dreamcast-Version-The-Grinch

Quake III Arena JP

The Japanese version of Quake III Arena appeared to be finished and ready to invade the Land of the Rising Sun, but SEGA’s announcement that it was withdrawing from the console market contributed to its cancellation. You can find more details about it in this article: [Quake III Arena Dreamcast and Its Eight Prototypes: When a Western FPS Nearly Made It to Japan]

Metropolis Street Racer JP

A prototype has been located, but its owner is currently unable to make it available online.

Ball Breakers

Released by BANANABREAK (date unknown). Hidden Palace archives its ISO here: [Ball Breakers (Oct 24, 2000 prototype)]

Non-exhaustive list, subject to change and updates

★★★ THE END ★★★: all that remains is to track down the cancelled Dreamcast games that existed in a playable form or for which some other trace still survives (video, document, artwork, etc.).