Intellivision

Rocky and Bullwinkle must stop the evil Boris and Natasha from robbing a train full of priceless valuables. While Boris uses "Upsidasium" to float the valuables up to Natasha's waiting helicopter, Rocky must fly around and intercept them. When Rocky catches the valuables, he gives them to Bullwinkle for safe keeping. The 2600 version of Rocky & Bullwinkle was actually designed before the Intellivision version, instead of the other way around as was usually the case. Even though Rocky & Bullwinkle was complete and passed quality assurance, it was canceled for unknown reasons. The Intellivision version was still on schedule to be released, but Mattel closed their doors before it could be completed.

Prototype of a game where's you're the Easter Bunny hopping around.

With the success of Masters of the Universe: The Power of He-Man, Marketing scheduled a sequel. Once again, the game would be in two parts, with one part assigned to Ray Kaestner and one to Rick Koenig. Ray and Rick developed some game screens using fancy new Intellivision effects, but no final name or plot for the game was agreed upon before Mattel Electronics closed. (Asked recently to describe his half of the game, Ray shrugged and replied "He-Man ran around fighting guys.") M Network versions were also scheduled for Atari 2600 and Colecovision, but little or no work was done on either. The screens Ray developed for Masters of the Universe II -- He- Man fighting bad guys on a multilevel 3-D game field with moving walls -- didn't go to waste; he recycled them in the INTV Corp. release Diner, a sequel to his game BurgerTime.

You play as Tron, making your way through a deadly maze, dodging bits and circuits. Arguably one of the worst games to "grace" the Intellivision.