Master Chief Petty Officer John-117, also known simply by his rank as the "Master Chief" or simply as the "Chief", is a Spartan-II supersoldier of the UNSC Navy's Special Weapons division.

At the start of Halo 5: Guardians (2015), Master Chief is contacted by Cortana, presumed to be destroyed in the previous game. She directs him to the human colony of Meridian.

Outside of video games, the Master Chief appears in the novels Halo: The Fall of Reach, Halo: The Flood, Halo: First Strike, and Halo: Uprising, and has cameos in Halo: Ghosts of Onyx …

Jun 24, 2025 · After racing through the first few entries, players are noticing that Master Chief has been notably absent in significant parts of the story. In Halo: ODST and Halo: Reach, he's …

Master Chief, the Arbiter, and humanity’s forces launched a desperate campaign to stop the Prophet of Truth from activating the Halo Array. Along the way, John was reunited with …

May 13, 2024 · After the climatic finale battle with Cortanta for the galaxy‘s fate in Halo 5, Master Chief was left directionless – defeated by a surprise ambush from Atriox‘s militant Banished …

Oct 26, 2015 · The chief has always been a bit of a rogue and a loner. But in the story of Halo 5, Master Chief goes absent without leave (AWOL), and his United Nations Space Command …

The primary protagonist of the Halo series, Spartan-II supersoldier Master Chief Petty Officer John-117, returns in Halo 5: Guardians following the end of Halo 4.

Mar 7, 2025 · With Master Chief turning -486 years old this year, here’s an in-depth look at John-117’s life, legacy, and impact on the Halo universe. In Master Chief’s first outing in Halo: …

Master Chief Petty Officer John-117, [Note 1] more commonly known as Master Chief, is a SPARTAN-II commando of the UNSC Naval Special Warfare Command. He is the protagonist …