How Pac-Man was born?
The fact that Pac-Man's shape outlines pizza with a missing slice and was the inspiration for Iwatani is only half-true.
Read storyOr at least this is the number it is possible to track.

By the year 1989, the physical game has sold more than 35 million copies. Another 35 million were sold along with the original Game Boy release. Plus, there are 425 million paid downloads of Tetris’s mobile app. All these figures come from an old VentureBeat interview year 2014, and the sales have not slowed down.
Considering that:
Tetris remains the best-selling game of all time.