Virtual-reality gaming is the new hotness, but for Nintendo, it's nothing new -- the company came out with its first VR console in 1995.

Unfortunately, the tech was not ready for prime time then. The 32-bit Virtual Boy was so heavy, it couldn't be worn on your head. And the red monochrome images projected on its screens were notorious for causing severe headaches.

The console was a huge flop for Nintendo, selling just 770,000 units. It was discontinued less than a year after its launch.