When Pac-Man was released, most arcade video games in North America were primarily space shooters such as Space Invaders, Defender, or Asteroids. The most visible minority were sports games that were mostly derivative of Pong. Pac-Man succeeded by creating a new genre and appealing to both males and females. Pac-Man is often credited with being a landmark in video game history, and is among the most famous arcade games of all time. The character also appears in more than 30 officially licensed game spin-offs, as well as in numerous unauthorized clones and bootlegs. According to the Davie Brown Index, Pac-Man has the highest brand awareness of any video game character among American consumers, recognized by 94 percent of them.

History

The game was developed primarily by Namco employee Toru Iwatani over 18 months. The original title was pronounced and was inspired by the Japanese onomatopoeic phrase , where transl: paku-paku describes (the sound of) the mouth movement when widely opened and then closed in succession.

When first launched in Japan by Namco, the game received a lukewarm response, as Space Invaders and other similar games were more popular at the time.

The following year, the game was picked up for manufacture in the U.S. by Bally division Midway, under the altered title Pac-Man (see Localization, below). American audiences welcomed a breakaway from conventions set by Space Invaders, which resulted in unprecedented popularity and revenue that rivaled its successful predecessor, as even Iwatani was impressed with U.S. sales. The game soon became a worldwide phenomenon within the video game industry, resulting in numerous sequels and merchandising tie-ins. Pac-Man's success bred imitation, and an entire genre of maze-chase video games soon emerged.

The unique game design inspired game publishers to be innovative rather than conservative, and encouraged them to speculate on game designs that broke from existing genres. Pac-Man introduced an element of humor into video games that designers sought to imitate, and appealed to a wider demographic than the teenage boys who flocked to the action-oriented games.

Competitors and distributors were taken completely by surprise by Pac-Man's success in North America in 1980. Marketing executives who saw Pac-Man at a trade show prior to release completely overlooked the game (along with the now classic Defender), while they looked to a racing car game called Rally-X as the game to outdo that year. The appeal of Pac-Man was such that the game caught on immediately with the public; it quickly became far more popular than anything seen in the game industry before. Pac-Man outstripped Asteroids as the greatest selling arcade game of the time, and would go on to sell over 350,000 units.