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.