2003

2003 saw the second and third novels, as well as Halo CE released for PC.

Unknown

 * The first line of Halo Action Figures is produced by Joyride Studios.

April
April 1
 * The novel, Halo: The Flood, is released.
 * The first episode of Red vs. Blue machinima series is released.

June
June 13
 * The official version of the Halo 2 E3 Demo is released on Bungie.net.

September
September 29 September 30
 * The first edition of Halo: Combat Evolved: Sybex Official Strategies & Secrets is released.
 * Halo: Combat Evolved for the PC is released.

October
October 28
 * A special edition of the Halo: Original Soundtrack is released.

December
December 2
 * The novel, Halo: First Strike is released.