Nintendo Game Processor: the lost game creation PC

The Nintendo Game Processor was a custom built computer - complete with a keyboard & mouse - that was built with one specific purpose: to visually create your own Super Nintendo games, via drag and drop, and write those games onto an actual SNES game cartridge.

Although the machine was never released, the planned architecture was really interesting: two parallel systems, one console-like which executed games natively and another where the development environment resided.