MCPON John-117, or "Master Chief", is a fictional character and the protagonist of the Halo fictional universe created by Bungie. Master Chief is a playable character in the series of science fiction first-person shooter video games: , Halo 2, Halo 3, Halo 4, and Halo 5: Guardians. Outside video games, the character appears in novels— , , , and —and has cameos in other Halo media, including , , The Halo Graphic Novel, Halo Legends and Halo 4: Forward Unto Dawn.