2010

2010 saw the release of Bungie's final Halo game, Halo: Reach, as well as the re-release of the first three Eric Nylund novels.

January

 * January 2: Origins Part I was shown on Halo Waypoint.
 * January 27: Issue 2 of Halo: Blood Line was released.

February

 * February 2: The second Mythic Map Pack is released on the Xbox LIVE Marketplace.
 * February 16: Halo Legends was released.
 * February 24: Issue 3 of Halo: Blood Line was released.

March

 * March 3: The Halo: Reach Multiplayer Trailer is released.
 * March 24: Issue 4 of Halo: Blood Line was released.

April

 * April 15: Microsoft discontinued all original Xbox LIVE services, including Halo 2.
 * April 28:
 * Issue 5 of Halo: Blood Line was released.
 * Birth of a Spartan was released.

May

 * May 3: The Halo: Reach Multiplayer Beta is launched.
 * May 20: The Halo: Reach Multiplayer Beta ends.

June

 * June 14:
 * The Halo: Reach E3 Campaign Demo is showcased at E3 2010.
 * The Halo: Reach E3 2010 Trailer is showcased at E3 2010.
 * June 16: The Halo: Reach Welcome to Firefight 2.0 Trailer is showcased at E3 2010.

July

 * July 29: The Halo Reach "The Battle Begins" Campaign Trailer was released.

August

 * August 3: The Tor Books reissue of Halo: The Fall of Reach is released.
 * August 17: Patrol, the first part of the Remember Reach campaign, was released and shown during GamesCom 2010.
 * August 23: The promotional website, Remember Reach, is fully unlocked for viewing.
 * August 26:
 * Deliver Hope, part of the Remember Reach campaign, was released.
 * New Life, part of the Remember Reach campaign, was released.
 * August 27: Spaceport and Day Before, both parts of the Remember Reach campaign, were released.

September

 * September: McFarlane Toy Company released the first action figures for Halo: Reach.
 * September 6: An extended cut of Deliver Hope, as part of the Remember Reach campaign, was released on YouTube.
 * September 14:
 * Halo: Reach was released in three editions in North America, Europe, Commonwealth of Australia and Asia, excluding Japan.
 * Halo: Reach Official Strategy Guide was released.
 * September 15:
 * The video game, Halo: Reach, is released in three editions in Japan.
 * The first issue of Halo: Fall of Reach - Boot Camp is released.
 * September 24: Creation of the Monument, part of the Remember Reach campaign, was released.
 * September 28: The reissue of Halo: The Flood was released.

October

 * October 13: The reprint of Halo: The Flood is released.
 * October 20: The second issue of Halo: Fall of Reach - Boot Camp is released.
 * October 24: The Noble Map Pack Trailer was released.

November

 * November 2: Volume I of the Halo: Evolutions reprint is released.
 * November 24: The third issue of Halo: Fall of Reach - Boot Camp is released.
 * November 30:
 * The Noble Map Pack is released.
 * Volume II of the Halo: Evolutions reprint is released.

December

 * December 21: The reprint of Halo: First Strike is released.