2017

==Real-world events==
===January===
*January 20-30: The Halo Wars 2 Blitz Beta was available.
===February===
*February 17: The Forge Leader DLC for Halo Wars 2 was released for free, ahead of the Halo Wars 2 release.
*February 21: Halo Wars 2 was released.
*February 22: Halo Wars: Definitive Edition left early access.
===March===
*March 20:
**The Kinsano Leader DLC for Halo Wars 2 was released.
**Through an update, achievements were added to the earlier released Forge Leader DLC, as well as three new ones related to the game's Campaign logs.
===April===
*April 20: Halo Wars: Definitive Edition was henceforth available separately from the Halo Wars 2: Ultimate Edition.
*April 25: Halo: Envoy was released.
*April 28: The Colony Leader DLC for Halo Wars 2 was released.
===May===
*May 22: The Sergeant Johnson Leader DLC for Halo Wars 2 was released.
===June===
*June 13: The Halo Wars 2 expansion Awakening the Nightmare is officially revealed, alongside the next two Leader DLCs; Jerome-092 and Arbiter Ripa 'Moramee.
*June 21: The Icons of War DLC containing Commander Jerome and The Arbiter Leader Packs for Halo Wars 2 was released.
*June 27: Halo: Escalation Library Volume #2 was released.
===July===
*July 25: The Serina Leader and Operation Spearbreaker DLC for Halo Wars 2 was released.
===August===
*August 17: The Yapyap the Destroyer Leader DLC for Halo Wars 2 was released.
*August 29: Halo: Retribution was released.
*August 30: Halo: Rise of Atriox Issue 1 was released.Halo Waypoint - Rockin' and Railin
===September===
*September 5: Halo: Warfleet was released.
*September 20: Halo: Rise of Atriox Issue 2 was released.
*September 26: The Awakening the Nightmare DLC is released for Halo Wars 2.
===October===
*October 17: Halo Recruit was released.
*October 18: Halo: Rise of Atriox Issue 3 was released.
*October 24: Halo: Adult Coloring Book was released.
===November===
*November 14: Halo: Legacy of Onyx was released.
===December===
*December 13: Halo: Rise of Atriox Issue 4 was released.
==Sources==