"Pac-Man World" is a 3D platform video game. Controlling Pac-Man, the player must complete each of the game's six worlds to rescue his friends, who are held captive by the ghosts in their homeland of Ghost Island. Worlds consist of five levels each, which are completed by eating all of the pellets to open up an exit door. The final level of each world has a boss that Pac-Man must defeat in order to progress. The player can choose which world to enter, although two of them are locked until the other four are completed. Worlds also vary in themes, featuring pirate ships, factories, a circus, graveyards and outer space.