love the bonks mock up on the yellow hundson logo - strange how they ended up doing full cover art for that release.

Does anybody know if a US prototype of Cosmic Epsilon has ever been found? I know there is a famicom version and I have seen a CES ad for a US release.

Released Xmas day 2018! That one's done.
 

I know several unreleased Famicom and Disk System that have been confirmed to exist. These are still undamped.

Baccarat (Pony Canyon) https://twitter.com/syou526/statu...

Love Quest (Tokuma Shoten) https://twitter.com/syou526/statu...

The Hunt for Red October - JP Version (Altron) https://twitter.com/berabo777/sta...

Nobunaga Senki (Towa Chiki) http://murakun5555.sub.jp/Introdu... https://famicoms.net/blog-entry-2...

Soldam (Jaleco) https://freshlive.tv/cityconnecti...

Ookami Tachi No Yabou (Jaleco) https://freshlive.tv/cityconnecti...

"Soldam" and "Ookami Tachi No Yabou" are owned by a company called City Connection, so it will not be expected to be dumped.

The source links of Soldam and Ookami Tachi no Yabou were distributed in game play, but that was over. It is very tragic. I'm sorry. 

 

The game screen of Soldam, Ookami Tachi No Yabou can be confirmed in the event "Jaleco exhibition" sponsored by City Connection on December 10, 2016. Ookami Tachi No Yabou seems to be a baseball adventure game.
http://dengekionline.com/elem/000...
https://www.hmv.co.jp/newsdetail/...

Unreleased Famicom - Fairyland Story Prototype ROM...
https://twitter.com/LLIKrD/status...

Hah, I had a hunch an NES version of that game would turn up eventually.
 

To be honest, I was not convinced of the existence of the prototype.
 

Fairyland Story was also submitted to NOA by Hot-B, though it was never publicly announced. It got a very low internal ratings score (16/40, literally the lowest score they ever gave anything, tied with M.U.S.C.L.E., Chubby Cherub and Urban Champion).

Fairyland Story has found a title on the Unreleased NES Games List at NESworld, but it was unexpected to be published by Hot-B.
 

It seems to be a prototype ROM of "Puyo Puyo" and "Gorby no Pipeline Daisakusen".
There are no buyers for now.
https://item.mercari.com/jp/m48897150172/
 

I'm surprised.  For $90,000 USD, it's basically free.
 

Prototype title is "Suidou Kouji"("水道工事", meaning is "water supply work").
It seems that the seller is thinking about selling to auctions other than Japan. It is expected that one day it will be on eBay.
 

please don't outbid me
 

https://twitter.com/gansomm/statu...
https://twitter.com/gansomm/statu...
I also want to let you know about one unreleased famicom.
There is no picture of the cart, but it seems that this gentleman owns the ROM of Irem's "Majū Toshi Naga" (魔獣都市ナーガ).

This game is Role-Playing, and the development seems to have been completed until the ending scene.

 

Been a while since I read something on the internet and literally laughed out loud.  This did it for me.

Hope all is well Frank!

Is Mr.Frank going to bid it?
If so, you should get it!

This is my guess, but it's a cancelled NES and Disk System game that believes that the prototype ROM is somewhere.

・NES
Arc Hound - Konami
Armadillo (US version) - IGS
Armadillo II - IGS
Aruden Raruden (Robocco Wars Prototype) - Taito
Batman Returns (Famicom JP verison) - Konami
Battleball - Vic Tokai
BIGFOOT (Famicom JP version) - Acclaim Japan
Blazebusters - Nexoft
Castlian (Kyoro Chan Land Prototype) - Hiro
Chestarfield (US version) - Vic Tokai
Combat Zone - BPS
Cosmic Epsilon (US version) - Asmik USA
Crash 'n Boys Ice Challenge - Technos Japan
Cyberball - Tengen
Daimaou ZARK Densetsu - J&U
Darc Seed (Zombie Nation Prototype) - Meldac
Dark Sider - Data East, Athena
De Javu II: Lost in Las Vegas - Kemco
Dungeon Horoki - Askii
Empire City 1931 - Acclaim
Felix the Cat (Famicom JP version) - Hudson
Francesca's Wand (The Krion Conquest Prototype) - Vic Tokai
Genju Souseiki - Nihon Bussan
Gen San no Quiz Triathlon - Irem
Geopolitic Tou ni Okeru Kokka Koubou Ron - Irem
Godzilla 2 (Famicom JP verison) - Toho
Hellraiser - Color Dreams
Hammerin' Harry (US version) - Irem
James Pond II Codename Robocod - Ocean
John Madden Football - UBI Soft
Jungle Taitei - Taito
KABUTO - Vic Tokai
Kung Fu II - Irem
Legend of Hero Tonma - Irem
License to Kill - Tengen
Matchbox Racers - Matchbox
Monster Truck Rodeo - Matchbox
Ninja Taro - American Sammy
Power Play Football - HAL America
Pyross - America Sammy
Rocket Ranger (Famicom JP version) - Kemco
Rune Master - Bandai
Rush & Crash - Capcom
Sakamoto Ryoma - Toshiba EMI
Seadog - Vic Tokai
Secret Warriors - Kemco
Shonen Majutsushi Indy - IGS
Shinkai - Toei Doga
Shogun Maeda (KABUTO US version) - Vic Tokai
Space Opera: Ōinaru Kamigami - Software Kogyo
Super Dog Booby - Jaleco
Super Password - Gametek
Super Square Deal - DTMC
Super Sushi Pinball - CSG Imagesoft
Switchblade - Kemco
Terror of Tech Town - Mattel
Trivial Pursuit - Parker Brothers
Ultimate Journey - Bandai
Urban Convoy - Matchbox
Web World - Matchbox

・Disk System
Dota Kun no Bōken Roman - Imagineer
The Super Rally - Vic Tokai

A "proto" of Madden exists, and I personally dumped it (privately) many years back.

It's a rolling demo of I think 4 static screens. It's 100% passive with no interactive portions and barely presents even as a proof of concept.

I have no knowledge of it being developed past this stage, but what exists is something I really wouldn't consider a prototype game. It's basically 4 pictures that can be displayed on an NES, nothing more.

Does that mean Madden unfinished ROM?
Even if gameplay is not possible, I think that it is ROM valuable enough.