Real World EventsEdit
- January 4: Halo: Cryptum, the first novel in the Forerunner Saga by Greg Bear, was released.
- March 15: The Defiant map pack was released for Halo: Reach.
- July 4: Halo: The Essential Visual Guide was released.
- September 19: The Halo Encyclopedia updated version was released.
- October 18: Halo: The Great Journey: The Art of Building Worlds was released.
- October 25: Halo: Glasslands, the first novel in the Kilo-Five Trilogy by Karen Traviss, was released.
- November 15: Halo: Combat Evolved Anniversary was released for the Xbox 360.