Virtual Boy
Game Boy - Did You Know Gaming? Feat. Jake of Vsauce3
In an interview with Metro, Jeremy 'Jez' San of Argonaut Software fame revealed he helped design a virtual reality gaming system named the "Super Visor" for Nintendo, but the system was ultimately cancelled in favour of the Virtual Boy.
Contributed by SkyminHAZBOZ
Early iterations of the Virtual Boy also included a gun that could be set on a flat surface, which would project a 3D hologram-like image into the air.
Contributed by TheProJamer
The original prototype for the Virtual Boy was blue and was actually supposed to be worn on the player's head like goggles. It had a screen/pad on the controller, the purpose of which is unknown.
Contributed by Boyobmas
Even though there was an expansion port for two-player modes, the cable that made this possible was never released due to the fact that the system was discontinued so quickly.
Contributed by gamemaster1991
A Full color Virtual Boy was impossible to release in 1995 due to the fact that high-efficiency blue and green LEDs only became available in 1996. The Virtual boy, which uses an oscillating mirror to transform a 1-D line of dots to a 2-D field of dots, requires high-performance LEDs in order to function correctly. Without the high-efficiency blue and green LEDs, the virtual boy was limited to a red-only display.
Contributed by ThisGuyInTheSuit