The original title was intended to be "Puck-Man", until marketers realized that materials used to promote the game could be vandalized by having a portion of the letter "P" removed, completely changing the way the name is read.
The highest possible score in Pac-Man is 3,333,360 points. The first known person ever to achieve a perfect score was an American named Billy Mitchell on 3 July 1999. It took him six hours and he had to endure 256 levels. On the final level, and due to a programming limitation, there is only half of the maze, the right side of the screen contains garbage characters. Once the ultimate score is reached, the game locks up, and would require a restart.
Pac Man was modeled after a piece of pizza
The character of Pac-Man is the first actual character featured in any video game.
Toru Iwatani stated that he created Pac-Man to attract girls to play the game as before the game was released arcades mostly had boys as patrons. So Iwatani intended to change that by creating a game that girls or the whole family can play.