Sputnik burned up in the atmosphere, Berlin is now one city, but 25 years later, the Soviet-designed Tetris remains one of the most popular and ubiquitous video games ever created. It has sold over 125 million copies, been released for nearly every video-game platform of the past two decades and even been played on the side of a skyscraper. Yet creator Alexey Pajitnov almost never saw a ruble for his creation.
-cnn
