Partway through the game, Jak and Daxter start to encounter strange creatures. A Precursor telescope in the outskirts of Haven City reveals that the beings are Dark Makers, who were once Precursors, but exposure to Dark Eco transformed them into twisted beings. Jak finds that a purple star in the sky is actually a Dark Maker space ship, and it is nearing the planet. The only way to stop the ship is to activate the planetary defense system situated at the core of the planet, and after defeating the Metal Heads and Deathbots in Haven City, Jak and Daxter begin their trek to the Planet Core.