Only released in Japan, the WonderSwan was Gunpei Yokoi's next system after developing the Virtual Boy for Nintendo (he also created the Video game Boy system and the Metroid series). The initial WonderSwan features a monochrome display and was developed to be played either vertically or horizontally.
Black & White/Monochrome Display
Vertical or Horizontal Screen Play when Rotated
Games Feature Amazing Crisp Graphics
Skeleton Green Case ~ Only Released in Japan