In the nearly 40 years since Tetris was invented, it has sold more than 520 million copies worldwide and been downloaded over 615 million times on mobile devices alone. The puzzle game—which requires players to fit together geometric shapes composed of four squares to form horizontal lines—skyrocketed to popularity so quickly that in 1994, writer Jeffrey Goldsmith coined the term the Tetris Effect to explain the psychological phenomenon that occurs when people devote so much time and attention to something that it begins to pattern their thoughts, mental images, and dreams. Tetris, a new Apple TV+ movie streaming March 31, explores the true story behind the late 1980s legal battle that led to the classic video game becoming an international phenomenon.