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A Tetris playfield

Tetris is a puzzle game, developed in the Soviet Union by Alexey Pajitnov in 1985. It has appeared on many video game systems.

Many companies have published Tetris games, such as Nintendo for the Game Boy and Nintendo Entertainment System. The Tetris Company, founded in 1996 by Pajitnov and Henk Rogers, manages and licenses the Tetris brand.

With over 500 million copies sold across all of its different versions, it is the best-selling video game of all time.