Halo is a video game franchise developed by Bungie, now owned and managed by Microsoft subsidiary 343 Industries. The franchise started with Halo: Combat Evolved on the Xbox in 2001. Since, the franchise has grown into a multi-billion dollar empire spanning video games, books, television, and film.

Halo follows the story Master Chief John-117, a Spartan supersoldier, as he fights for humanity in an interstellar war against an alliance of aliens known as the Covenant.

The original Halo trilogy consists of three video games; Halo: Combat Evolved, Halo 2, and Halo 3. The Reclaimer Saga is the second trilogy of Master Chief, consisting of Halo 4, Halo 5: Guardians and the upcoming Halo: Infinite. Various spin-offs are under in the franchise too, including Halo 3: ODST, Halo: Reach, Halo Wars, and more.