The story first takes place in the Netherworld, where Betrayus is looking weak after a sure brutal battle with Pac-Man, he is angry and wants to fight him again, but he has been weak for a very long state. A shadow appears in Betrayus' room, where the shadow speaks to Betrayus, and uses a form of magic to heal his wounds, Betrayus is then healed, and he is asked to join the mysterious entity to destroy Pac-Man, Betrayus agrees, and they disappear in a flash.
Later, Erwin appears to have crashed into Pac-Mans' world, it is revealed Pac-Man also defeated him again. Betrayus and the mysterious figure talk to Erwin, and he joins the two.
The three evildoers head to Ghost Island and find Orson and the Ghost Gang, Blinky is shocked and yells out the word "Spooky", revealing that the figure was Spooky, who escaped from the Golden Tree again! The Ghost Gang quickly join the side of evil after Spooky mentions that he and these other defeated villains are bringing vengeance to the yellow hero. Orson doesn't want to join until the Ghost Gang persuade him to do, after what Pac-Man had done to his machine and how he ate him. Orson remembers that and still is not sure until Spooky fears the Ghost and threatens him, Orson has no choice and joins the evil team.
Now the scene takes years after Erwins' defeat and Pac-Man has defeated many foes including the vicious Spooky and the mad genius Erwin. Pac-Man is now living a peaceful life again until he confronted by the Ghost Gang, who have a master plan to turn Pac-Land into a world full of ghosts, but Pac-Man isn't going to let then, until he is knocked back by Spooky himself, who mysteriously has escaped from the Golden Tree, not only that, Orson appears with a stronger Toc-Man in order to destroy the annoying Pac once and for all. Erwin also miraculously appears with a space craft that abducts some of the citizens of Pac-Land. The wicked Betrayus appears after years too, he opens a portal that unleashes a army of ghosts to swarm Pac-Land.
Pac-Mans old enemies then retreat to start their new conquest to destroy the Pac-People, so now, Pac-Man must head out on yet another huge adventure to defeat his many powerful foes from the past, to save Pac-Land from doom.
The gameplay is very similar to the past Pac-Man World titles, however, it is mostly similar to Pac-Man World 2. Pac-Man can move using the analog stick and is able to jump using the A button and can butt bounce by pressing A in the air too. He is also able to do his trademark Rev-Roll holding the X button. Pac-Man gains some new abilities such as the Uppercut, which works like the Flip Kick, it makes Pac-Man spin around and give a power packed punch to an enemy in the air.
|Pac-Man||The famous hero of Pac-Land, is back to defeat his old foes and the Ghost Gang, to protect Pac-Land from the killer ghosts who have invaded his world once again.|
|The Ghost Gang||The well known enemies of Pac-Man have joined forces with Spooky, Erwin, Orson, and Betrayus to take down that pathetic Pac-Man in order to conquer his world!|
|No Image Available||Spooky||The almighty powerful Spooky somehow managed to escape from the Golden Tree after being banished once again by the heroic Pac-Man, of course he wants revenge, and he is stronger than ever!|
|Orson||The genius Orson has strangely went on the side on evil after helping Pac-Man, he still wants to destroy him after what he did to him the first time, and he's ready to use Toc-Man to totally crush him.|
|Toc-Man||The mechanical beast known as Toc-Man has been upgraded to be more stronger by the genius Orson, he wants nothing but destruction to Pac-Man.|
|Erwin||He's back and totally wants to eliminate Pac-Man after he ruined his ultimate plan to take control of the Ghost Gang, this time he is showing no mercy.|
|Betrayus||After being defeated so many times by Pac-Man, Betrayus has learned and has become a superior ghost, his powers are nothing like before.|
|Ghosts||These guys are pretty much the main enemies of the game, and they totally want to take over Pac-Land. A Power Pellet is sure to take these evil things down.|