Miorry Nobitto

Pac-Man makes a cameo in Tron. 

I remember people mentioning the Pacman cameo, but I only heard the sound effects from the game, but not the actual appearance.  I guess some people in Disney were fans of the game.  It is kind of ironic that the Tron game would share space in arcades with Pac-Man later on. 

They mention the Pac-Man thing in the Nostalgia Chick review of Tron.