Halo 4 ushers in the return of mankind’s greatest hero, the Master Chief, in a newly envisioned, epic sci-fi adventure.

Set nearly five years after the events of Halo 3, Halo 4 follows the Master Chief and his faithful artificial intelligence (AI) companion Cortana as they venture into a mysterious new world and discover an overpowering ancient evil that threatens to annihilate mankind. With humanity’s fate hanging in the balance, the Master Chief and Cortana are thrust into a desperate mission against overwhelming odds to save mankind from the threat of imminent extinction.

Today Microsoft and 343 Industries announced the return of Spartan Ops: Season One, which includes five weeks of brand-new content – from Jan. 21 through Feb. 24 – returning players to the episodic adventure that tells the continuing story of the UNSC Infinity. 

Reenlist with Fireteam Crimson as they search for Spartan Thorne on planet Requiem and come face-to-face with the threat of Jul ‘Mdama and his cult of Covenant separatists. The intensity of Season One builds to its thrilling conclusion in Episodes 6-10 as the battle moves beyond Requiem to a wide variety of locations featuring epic vehicular combat and on-foot encounters with Prometheans and Covenant forces.

Each week in “Halo 4,” experience a new high-quality cinematic episode, and fight alongside friends in five action-packed playable chapters through Feb. 24. Continuing the story following the events of “Halo 4,” access to Spartan Ops is included with “Halo 4” at no additional charge — effectively delivering two campaign experiences in one game.1

The first half of Spartan Ops: Season One (Episodes 1-5) is available for play at any time in “Halo 4” for those beginning their Spartan careers. Get introduced to Captain Lasky, Commander Palmer and Fireteam Majestic as they continue to explore the mysterious of the Forerunner planet of Requiem.