Announced in 1983.
Video Games Player magazine. 

Challenger
Coleco Inc. (Centuri)

A version is made by Chris Derrig.
Published via CollectorVision Games in 2019.

Dimensional Puzzles
Coleco Inc.

Announced in 1983.
Video Games Player magazine.

Nothing exist from Coleco.

Opcode Games drawn some graphics for the game, but it was a screen or two.

A new CV version is released via CollectorVision Games.

Dracula
Coleco Inc.

Only one screenshot from the 80's exist, and a mirrored one by J-F at CollectorVision Games.
Later Graphics and a story for the game was begun years ago by Dale Wick.
But it seems CollectorVision Games is more serious around the story and what it could look alike.

Dracula is still a waporware, although with a little progress.

Team Pixelboy released the ADAM Disk version for ColecoVision into a Super Game Cartridge version Jan. 2013.

Head To Head Baseball
Coleco Inc.

Name changed to: Super Action Baseball.
There is provided a box for this cartridge via CollectorVision Games.

Head To Head Football
Coleco Inc.

Name changed to: Super Action Football.

Mr. Turtle
Coleco Inc.

Never released, but Mr. Brophy programmed his own CV version and a story for the game in 2015.

Never released.
A single screen in the 80's was made, and an animation was that made for this single screen.
This animation was shown at various exhibitions and shows around USA. and Canada.

Another Youki Surprise.
1992.

Released by Côté Gamers summer 2021.

Skiing
Coleco Inc.

One TeleGames Version exists, but not this early original ColecoVision version shown here.
J-F at CollectorVision Games created a new indentical screenshot as you can see.
And they also work on some graphics for the game.
A demo of the game and how it could have been was made by: "else" in 2019. 

Spectar / Spectank
Coleco Inc.

An unreleased game from Coleco's catalog.
Scott Huggins and Daniel Bienvenu both made their own version of this game.
Coleco never release anything than a screenshot.
Scott Huggins released his ColecoVision version in a cartridge format in 2006.

Sword And The Sorcerer
Coleco Inc.

Tac/Scan
Coleco Inc.

There was made 2 levels for this game.
If you have those screenshots, please share them.

The Wizard Of Oz
CBS Electronics.

From the classic musical starring Judy Garland.
Get Dorothy and her friends to the Emerald City while avoiding Monkey Men,
And the wicked witch of the west.
Announced in 1983.
Video Games Player magazine.

Tunnels & Trolls
Coleco Inc. (Flying Buffalo)

Screen 1 is a mockup of the game. From the press kit or the ColecoVision box.
Screen 2 from the prototyped version.
Note that, the rosa color is not possible with the ColecoVision palette.

Wizard Of Wor
Bally Midway.

Never released by Coleco / CBS for ColecoVision.
Opcode Games has plan to make another version of the game sometime in the future.
Also Tony from Australia was begun at this game.
But Team Pixelboy was first with a release in January 2018.
Screenshot #1 is from the press kit, and screenshot #2 is the released ColecoVision version.
Wizard Of Wor for ColecoVision is made by Armando Pérez Abad.

2 different Prototypes exist for ColecoVision.
Eduardo Mello released the MSX version of Billiards for Team Pixelboy in 2011.

Las Vegas
Fidelity

An empty cartridge with a label exists in the first Presskit from Coleco Inc.
No work ever from Fidelity Electronics in the 80's.

A new version of Turmoil 2021 exist by: 8 bit Milli.

Air Defense
Odyssey

Caverns And Creatures
Odyssey

Flashpoint
Odyssey

A proven playable proto exist.
The CollectorVision Games Brotherhood is the new owner of the CV Pink Panther.

Pink Panther were officially released in 2020 by CollectorVision Games.

Power Lords, Quest For Volcan
Probe 2000

50 copies in cartridge format of this demo was released at CGE in 2000.

Source: Computer Entertainer, planned, January 1985. 

Space Shuttle just blew up just before it was finished for ColecoVision.

Team Pixelboy will release the MSX version for the ColecoVision.
The TP box is close to the MSX box release from 1984.

Steamroller
Activision

David Rolfe was in the 80's hired from Cheshire Engineering to complete the game for ColecoVision.
But it was never released before now.
Kieth Robinson got permission from Activision to produce a limited run of Steamroller for collectors.
Published in the year of 2000 by: Retrotopia / Intellivision for ColecoVision.

Smurf Play 'n Learn
Wallace Berrie & Co.

No work was ever made by Coleco.
Joseph Kollar & Scott Huggins made a version for ColecoVision in 2003.
60% code was done, but they could not handle it. Their game was never finished.
As Scott said (~2008): "The game was never finished, it has many errors. Our last version exists out there and it's playable."
It says that J-F at CollectorVision has the ROM from Scott Huggins. Not confirmed.
Also Opcode Games will soon be ready with an Arcade version of this most wanted game.

The game was never finished and never hit the market in a cartridge form.

From 2007.
Never released in CIB version.
You can get the cartridge via AtariAge.

Never finished.

The game was never finished.
Several experiments for a box was created.

Prototype exist, and this version was later released as a loose cartridge as is.

There is a lot of flicker in the game, need a polish for the engine.
Opcode Game says they will release a better version based on the Arcade Version.

Prototype exist without Sound.
A new version, now with sound was released by Team Pixelboy in 2014.

Prototype by: Matthew Householder.
Never released in CIB format.
Matt changed his graphic after the crash in 84' because of the Atari.
The game was later recreated by: Daniel Bienvenu, and another 3rd upgraded version together with others.

CollectorVision released the 3rd upgraded ColecoVision version under its original name, namely Moon Patrol.

Never seen anything about this version for ColecoVision.
No evidence exist.

Prototype exist in ROM and Cartridge format
The story is that Atari withdrew their version, because the version was significantly better on ColecoVision than their own Atari at that point.

Never released for ColecoVision.
No evidence exist.

Rasmus at TI99/4A is testing how it could work with the grahpic chip TMS 99xx.
So maybe a TI and a CV version in a near future.

Robotron
AtariSoft

Never released for ColecoVision.
No evidence exist.

A version of Robtron 2084 by Charles Spencer is released via CollectorVision Games in 2022.

Never released for ColecoVision.
No evidence exist.

Vanguard
Coleco Inc. (AtariSoft)

Never released for ColecoVision.
Empty Cartridge with label exists in the first Presskit.

A version from Chris Derrig is released via CollectorVision Games in 2019.

Chess Challenger
Fidelity

Empty cartridge with a label in the first presskit exist.
CollectorVision Games created a new graphical screen on the right.
The game was completed in 2011 and sold through CollectorVision Games in 2013. 

Screen 1 is from the presskit, and screen 2 is from a homebrew programmer.
Again a game that never was finished, but RT12 Production and "else" is working on each version, now for years. 

Not originally released, but TeleGames released this game as Amazing Bumpman.
A box for Number Bumper was released in 2007 by CollectorVision Games.

Close to the game: "Quest For The Golden Chalice" 

Astro Chase
Parker Brothers.
Screenshots is possibly from the Atari 5200.

Do not exist for ColecoVision.

A planned Parker version by Konami was never published for ColecoVision.

But the later MSX version by Konami was converted and distributed via Team Pixelboy in 2011. 

Crash Drive
Parker Brothers

What this game would be and look like it was begun.
Evidence exists in pics, text, video and a prototyped version. 

Dragonstomper
Starpath

Phaser Patrol
Starpath

Charles Spencer is currently working on a lincensed version.

Source: Computer Entertainer January 1985.
Planned, Fall 1985.

Could have been a promising and very wanted Pinball game.
Never released for ColecoVision.

Help Bounty Bob, save people from the fire in buildings.

Bill Hogue says:
"Sadly I don't think anyone will ever get to see the version of Scraper Caper as I foolishly tossed out every disk and tape I had many years ago."

Source: Computer Entertainer January 1985.
Planned, Fall 1985.

A Jawbreaker version is released by CollectorVision Games without sound.

A new version of Jawbreaker 1 and 2 is released from CollectorVision Games.
Now with sound.

An reprogrammed Mexican version exist and released via CollectorVision Games.

Source: Computer Entertainer January 1985.
Planned: Spring 1985.

Ice Palace
Xonox 1984

Action-adventure-platform game.
Demo exist, Video, Intro screen, skill level and some ice graphic. (platform).

Side Trak
Exidy

Exidy's planned version was never released for ColecoVision.
The new version was reprogrammed by: Russ Kumro.
Released via CollectorVision Games in 2012.

Rip Cord
Exidy

Never released for ColecoVision.

CollectorVision Games released this colorful version in 2017.

Non exist version, but these screenshots and demo was made by CollectorVision Games.

Burgertime by: Mattel Electronics in France.

Nice Ideas completed BurgerTime in 1983 for Coleco Inc.
Coleco did not use Mattel's version, they downgraded the game.
Coleco released it late in 1984/85 BurgerTime as an 84 ColecoVision style game.
A small bug was never fixed nor even in the final ColecoVision version.

Bump 'n' Jump by: Mattel Electronics in France.
Label: Nice Ideas for Coleco Inc.

Mattel 1983 version was never distributed by: Coleco.
Coleco scaled it down, and changed it to their own version.
The game was released late in 1984. 

Masters Of The Universe
Mattel Electronics in France.
Label: Nice Ideas.

The game was essentially finished in the mid 80's, just needed a little fine tuning.
 A ColecoVision Box was made on Computer by CollectorVision Games years ago, but was never put into production.
The game exists in 3 different versions, but Mattel blocks for their own version for a release, unknown why.

The first image to the right has been restored by: ColecoVision.dk, May 03, 2020.

Illusions
Mattel Electronics in France.
Label: Nice Ideas.

The Mattel version was never distributed, only by Coleco in their adapted changed ColecoVision version. 

Dungeons & Dragons IV
Mattel Electronics in France.
Label: TSR.

What the game would be and look like was begun, but no images are found.

Masters Of The Universe II
Mattel Electronics in France
Label: Nice Ideas.

Eric's ColecoVision version went unfinished. 

Flashlight
Mattel Electronics in France.
Label: Nice Ideas.

No one ever worked on the project other than a name. 

Pizza Time
Mattel Electronics in France.
Label: Nice Ideas.

Public announcement of this game was never made.
No pics exist in public.
Pizza Time is similar to Burger Time, just with Pizzas. 

Magic Carpet
Mattel Electronics in France.
Label: Nice Ideas.

Public announcement of this game was never made.
No pics exist in public.

Hydroplane
Mattel Electronics in France.
Label: Nice Ideas.

Very little was done before Mattel Electronics closed their division.

Wild Western
Taito

Was only in beginning phase.
Screenshots made by Eduardo Mello at Opcode Games.
The game was first meant as an April Fool day joke.
Demo ROM version by Opcode Games exist.
Never released as a full game.

Proto out there.

Dropped.
No work on the game, only a box template. 

Domino Man
CBS Electronics

Maddenness
CBS Electronics.

Wings
CBS Electronics.

Eduardo Mello has made a close to arcade demo in late 2010 and updated this in 2017.
Opcode Games will release their version based on the arcade version in a near future. (2025).

Never finished.
No box, manual or label was ever made.
The game would include 7 sports games.

Only 5 protos by Opcode Games was made and sold for ColecoVision.
Box and label was later made for these protos.

A new version by Crazy Boss was released via CollectorVision Games back in January 2015.
In the new version, is the color of the baker's pants changed to Magenta.
And a high score board is added.

Only 5 protos sold for ColecoVision.
There exist 5 costum made plastic boxes from Opcode Games exactly for this prototyped game. 

Only 5 protos sold for ColecoVision.
Note: No bonus stage in this version.
There exist 5 costum made plastic boxes from Opcode Games exactly for this prototyped game. 

Only 5 protos sold for ColecoVision.
No box and label was ever made.
There exist 5 costum made plastic boxes from Opcode Games exactly for this prototyped game.

SG-1000 version by Opcode Games released as a ColecoVision proto via Team Pixelboy.
Only 5 protos exists.
There exist 5 costum made plastic boxes from Opcode Games exactly for this prototyped game.

Source: Computer Entertainer January 1985.
Planned for December 1985.