Dr.Vita on 08 April 2015
Skullwaker said: "Tetris, the world’s most successful game, is 30 years old today. Thanks to its simple and addictive gameplay, the massive popularity of the original Game Boy and mobile phones, an estimated 170 million copies of Tetris have been sold since its debut in 1984. " |
Tetris is a game series, it isn't only one game (Tetris Plus, Tetris DS, Tetris Worlds)!
And a huge part of 170M copies sold should be digital (considering that Tetris is a Free2Play game on Smartphones).