Google celebrating Pac_Man 30th anniversary by changing its logo to the playable Pac-Man arcade game.

Pac-Man (パックマン, Pakkuman) is an arcade game developed by Namco and licensed for distribution in the U.S. by Midway, first released in Japan on May 22, 1980. Immensely popular in the United States from its original release to the present day, Pac-Man is universally considered as one of the classics of the medium, virtually synonymous with video games, and an icon of the 1980s popular culture. Upon its release, the game—and, subsequently, its derivatives—became a social phenomenon that sold a bevy of merchandise and also inspired, among other things, an animated television series and a top-ten hit single.