Tetris is a logical thinking game designed by a Soviet software engineer named Alexey Pajitnov in June 1984. As a mathematician and is working at Dorodnitsyn Computer Center of the Soviet Academy of Sciences. He loves geometry and the puzzles are made of them. Therefore, Alexey Pajitnov developed a game to satisfy his passion for geometry. The name Tetris was coined by Alexey Pajitnov based on a combination of the Greek prefix tetra and tennis as his favorite sport. At that time, this was the first game that the United States imported from the Soviet Union. Because of its versatility, the game is compatible with nearly every gaming device and computer operating system, as well as on devices such as computers and mobile phones. In January 2010, it was announced that this was one of the most successful commercialized games and had sold more than a total of over 170 million copies. About 70 million copies are sales with CDs and 100 million copies are downloaded on mobile phones. This has turned it into the second best-selling paid download game of all time after Minecraft.
