Raspunsul la intrebarea "Cate nivele are Portal 2 ?", este: 9 Chapter I: The Courtesy Call walkthrough: Chapter I:The Cold Boot walkthrough: Chapter III:The Return walkthrough: Chapter IV:The Surprise walkthrough: Chapter V:The Escape walkthrough: Chapter VI:The Fall walkthrough: Chapter VII:The Reunion walkthrough: Chapter VIII:The Itch walkthrough: Chapter IX:The Part Where... walkthrough: * Walkthrough video pentru toate capitolele aici: http://www.ign.com/videos/ga