Three years ago, Kevin Bates created a Tetris-playing business card to showcase his engineering skills to potential employers. But his creation quickly went viral on the internet, and everyone reminiscing about their beloved childhood Game Boy clamored for their own. After testing the waters with the equally tiny Arduboy, Bates has finally delivered an officially-licensed Tetris MicroCard. If you've got $US60 ($79) to spare on a tiny machine that plays a single game, you're going to want this in your wallet.