Year: 1989 

Some might call it unfair to place Nintendo's portable gaming system on this list. Others will complain over its ranking. But even during its six-month run throughout the decade, the Game Boy borgarted the handheld gaming scene and made everyone think twice about investing in those medicore Tiger game systems. Final Fantasy Legend, Super Mario Land, and Tetris were all we needed to pass the time in class or on the train. And as we witnessed, the Game Boy went on to have a more dominant run in the '90s.