High Quality Content by WIKIPEDIA articles! Arbiter is a fictional ceremonial, religious, and political rank bestowed upon alien Covenant Elites in the Halo science fiction universe. In the 2004 video game Halo 2, the rank is given to a disgraced commander as a way to atone for his failures. Although the Arbiter is intended to die serving the Covenant leadership, the High Prophets, he survives his missions and the Prophets` subsequent betrayal of his kind. When he learns that the Prophets` plans would doom all sentient life in the galaxy to extinction, the Arbiter allies with the Covenant`s enemies—humanity—and stops the ringworld Halo from being activated. The Arbiter is a playable character in Halo 2 and its 2007 sequel Halo 3; a different Arbiter appears in the 2009 real-time strategy game Halo Wars, which takes place 20 years before the events of the main trilogy.