The Game Boy just turned 20; here are six reasons why it was so successful. Surprisingly, the list is not:
Tetris didn’t start with the Game Boy, of course (Pajitnov created it for the PC in 1985), but the Game Boy made it mainstream. Ultimately, Tetris proved so popular that it quickly drove sales of Nintendo’s handheld console into the millions. Tetris’s grown-up gameplay also attracted adults to Nintendo’s new platform, expanding Game Boy’s potential audience beyond the usual adolescent NES set.
Somewhere, I still have an original Game Boy with a Tetris cart wedged into it.