2013

February 18: The first season of Spartan Ops ends.
February 25: The Majestic Map Pack is released.
March 19: Halo: Silentium, the third and final novel of the Forerunner Saga, is released.^[1]
March 29: Forge Island is released.^[2]
April 8: The Castle Map Pack is released.
April 9: Halo 4: Original Soundtrack Volume 2 is released.
May 27: The Halo 4: Forward Unto Dawn Deluxe Edition Blu-ray/DVD Combo is released for Region 2.^[3]
June 10: Halo Xbox One is announced.
July 10: Halo 4: Forward Unto Dawn Original Soundtrack is released.
July 18: Halo: Spartan Assault^[4] and its soundtrack are released.^[5]
August 14: The first issue of Halo: Initiation is released.^[6]
August 20: The Bullseye Map Pack, Infinity Armor Pack and Steel Skin Pack are released.^[7]
August 29: A title update for Halo: Spartan Assault is set to be released.^[8]
September 11: The second issue of Halo: Initiation is set to be released.^[9]
September 16: Halo 4: The Essential Visual Guide is set to be released.^[10]
October:
- The second series of Halo 4 McFarlane Toys is set to be released.
- Halo 4 Game of the Year Edition is set to be released.^[11]
October 9: The third and final issue of Halo: Initiation is set to be released.^[12]
December 11: The first issue of Halo: Escalation is set to be released.^[13]

Sources