This is a prototype board for the Nintendo Game Boy Color. This is the type of board that would be sent to game developers to test their game code before Nintendo had the production units ready.

This is a picture of the early prototype of Donkey Kong Jr. Coleco was going to go with the same design as Pac Man, Ms Pac Man, Galaxian, Frogger and Donkey Kong- making it look like a little arcade …

09/18/2024- Games Added: Mattel - Football (Clear Prototype), and others to the Rarities page. I added a separate entry on the Mattel page for the clear Football game, it's that cool.

Mattel Auto Race was designed in 1976 by George Klose, who built a fully functional prototype that was shown around to prospective buyers for large chains like Sears and such.

This third game is a sample/prototype of Mattel's Soccer in dark forest green. Mattel originally wanted to use this color for the game, but it was determined that the color pigment was too costly, so they went …

Designed by: Bob Doyle and Holly Doyle- View the original Prototype! View Manual 6 games in 1! Second pic is the U.K. box style. This has been re-released by Milton Bradley (I guess Hasbro …

Parker Brothers Merlin Prototype Designed/Invented by: Bob Doyle and Holly Doyle

Yes, the picture below is just the normal Gin game, and that's exactly what the only known prototype of this game looks like becuase it was built into an existing Computer Gin case at Mattel.

Original prototype drawing of Formula Racer from a trade catalog. This game became Speed Freak before it was finally released (this is further proved by the model number, as seen in the picture it's …

Original prototype drawing of Space Battle from a trade catalog. This game became Star Hawk before it was finally released (this is further proved by the model number, as seen in the picture it's #5152, …