Tetris is a computer and video puzzle game created in 1985 by the Russian computing engineer Alexey Pajit-nov. It is the most widely reproduced game of all time, appearing on 55 game platforms, including every major console and computer system; on mobile phones; and in interactive art exhibitions. It continues to be popular among a wide variety of casual and serious gamers, appearing second in IGN Entertainment's Top 100 games of all time in 2007. The success of Tetris derives from its simple but addictive game play. A sequence of regular geometric tiles, each composed of four squares arranged into seven basic shapes, falls relentlessly from the top of the play area to form a stack at the bottom. As they fall, the player must rotate and guide the tiles, attempting to slot them into the stack below so that no gaps ...