Cartman runs over to
Stan's house to warn him that 'horrible beings' are attacking South Park. The two are able to defend the household from an army of
Ginger Kids and
Cows before picking up
Kyle and running to their school. Once again, they manage to protect the area, but Cartman receives a phone call from
Kenny, who is under attack. After helping Kenny fight off another horde of enemies, the boys deduce that the one responsible for the mayhem can only be an evil supervillain:
Professor Chaos. The boys reach Butters' house and confront Chaos, but he claims that his only evil plan was "to replace all the healthy vitamin water in the pharmacy with boring old regular water". During a battle with another group of enemies, one of Butters' testicles is shattered, so the boys take him to Hell's Pass Hospital and protect it while he is being healed. Jimmy runs in to tell the boys to head to Stark's Pond, where they help Jimbo and Ned stop another group of enemies from destroying the town. Craig directs them to the lair of the
6th Graders, led by
Scott Tenorman, who have been recruited by the sinister evil that looms over the town. After defeating Scott and the 6th Graders, Clyde tells the gang to help Mr. Lu Kim defend the Great Wall of South Park from an army of
Mongolians. After a long battle, the boys and Lu Kim are victorious, but only before being redirected once again, this time to the South Park Docks, by Tweek. The boys defend the Docks from a group of enemies led by
General Disarray. After doing so, Pip attempts to reveal the villain's identity to the boys, but, typically, they reject him before he is able to finish his sentence. The boys head up high into the mountains above South Park to meet Randy, who tells them that they are about to be attacked. They are able to stop
ManBearPig and a mass of Demons from taking over the geology building, before Timmy comes to meet them and they are directed one final time to Downtown South Park. Randy confirms that they must head Downtown to stop the villain, and warns the boys that "he has always been waiting" for them. The boys stop a huge army of assorted enemies from destroying the town hall before a voice announces 'Game Over' and the game world collapses. After the boys are pulled out into a world beyond the Universe, the villain is revealed to be the
Japanese Announcer (who provides voice-overs during gameplay), who has been manipulating South Park and using the boys as pawns. The Announcer then attacks South Park and attempts to storm the town hall himself, but the boys are able to defeat him. Without an ultimate villain controlling South Park, the evil forces disappear and everything returns to normal. ==Development==