Hover Force 3D (Unreleased)
In the early 1980s, researchers at the University of Georgia developed a technology for viewing three-dimensional images using glasses fitted with special prisms, and attempted to solicit interest from various video game companies. Mattel Electronics began pursuing the technology, with Hover Force, then marketed as Hover Force 3-D, making its debut at the Consumer Electronics Show in Las Vegas in January 1984. Mattel Electronics had developed a method for producing the glasses at low cost, and had even decided to develop two additional 3-D titles, but the company was shut down before the plans could come to fruition. INTV Corporation, which acquired Intellivisions assets from Mattel, re-tooled the game and dropped any mention of 3-D for its release in 1986.
The technology was later used by Crayola for their 3D Chalk toy and these glasses can be used to experience the 3D effects in this Intellivision game