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Tetris stands as one of the most popular games of all time. The game was created in 1984 by a Russian software engineer, Alexey Pajitnov. He wanted to make a game that was simple to play but had a lot of variety. Though the game rose up in great success, Pajitnov didn't receive any money for his work until 1997. 
Tetris is played with four-sided blocks. To name the game, Pajitnov used the word "four" in Greek, which is "Tetra." And he combined "Tetra" with the name of hi...