2007 (real world)

The year 2007 saw the release of several Halo-related titles, most notably Halo 3, the conclusion to the Halo trilogy, and the novel Halo: Contact Harvest.

February

 * February 20: Crackdown, a game containing an invitation to the Halo 3 Beta, was released.

April

 * April 17: The Blastacular Pack for Halo 2 is released.
 * April 19: The book Halo Effect: An Unauthorized Look at the Most Successful Video Game of All Time is released

May

 * May 11: The Halo 3 Beta is first released to a limited audience.
 * May 16: The Halo 3 Beta becomes accessible to the public.
 * May 31: Halo 2 Vista is released for the PC.

June

 * June 10: The Halo 3 Beta comes to a close.
 * June 14: Halo 3: The Cradle of Life was found by a Bungie.net user, crazyBoy3.

July

 * July 10:
 * The Halo 3 E3 2007 Trailer is released.
 * Halo: Arms Race, the first in the Halo: Landfall series of live-action short films, is released.

August

 * August 1: Marathon 2: Durandal is released on Xbox Live Arcade.
 * August 10: An internal build of Halo 3 titled Halo 3 Epsilon is released to Microsoft employees.
 * August 22: The first issue of the Halo: Uprising series of comics is released.
 * August 28: Halo: Combat, the second part of the Halo: Landfall series, is released.
 * August 29:
 * Halo 3 goes gold.
 * Halo 3 Epsilon is closed.

September

 * September 18: ''Halo ActionClix is released
 * September 24: Halo: Last One Standing, the final part of Halo: Landfall, is released.
 * September 25:
 * Halo 3 released in North America.
 * Halo 3: The Official Strategy Guide was released.
 * September 26: Halo 3 released in Europe.
 * September 27: Halo 3 released in Japan and the rest of Asia.
 * September 28: Halo 3 released in most South Korean video game shops.

October

 * October 9: Gravesite was released digitally.
 * October 30: The novel Halo: Contact Harvest is released.

November

 * November 20: The Halo 3: Original Soundtrack is released.
 * November 21: The second issue of Halo: Uprising is released.

December

 * December 11: The Heroic Map Pack for Halo 3 is released.

Unknown Date

 * Museum first aired on TV.
 * The trailer Believe: The John 117 Monument was released.
 * Enemy Weapon first aired on TV.