Master Chief Petty Officer John-117 is a SPARTAN-II Commando of the UNSC Naval Special Warfare Command. With nearly 30 years of active duty, he is one of the most decorated soldiers in the United Nations Space Command and has earned every known medal in the UNSC except the Prisoner of War Ribbon. In 2553, John-117 went missing in action after the Second Battle of Installation 00 when he and Arbiter Thel 'Vadam eliminated the Flood threat [1]. He is more commonly known as the "Demon" by the Covenant and the Sangheili, "Master Chief" by Humans, and "Reclaimer" by 343 Guilty Spark. I got this off of Halopedia.
yes master chief's name is john....john117
John117, mostly known as Master chief, is more famous then most Steam games combined. Halo is actually more famous then John, giving an eye on him. As of the moment, the release of Halo 4 or Halflife 3 really determines the more famous one.