2005 (real world)

In 2005 the Xbox 360 was officially announced. The year also saw the release and ongoing support of several pieces of downloadable content for the previous year's Halo 2; including Title Updates and map packs.

April
April 18 April 25
 * Halo 2 Auto-Update 2 was released.
 * The Bonus Map Pack and Killtacular Pack for Halo 2 were released.

May
May 12
 * The Xbox 360 console was officially announced.

July
July 5 July 20
 * The Halo 2 Multiplayer Map Pack and Maptacular Pack for Halo 2 were released.
 * Halo 2 Auto-Update 4 is released.

October
October 6
 * Halo Triple Pack was released.

November
November 22
 * The Xbox 360 console was released in the U.S.

December
December 29
 * Dead or Alive 4, featuring the canon Halo crossover character Nicole-458, was released.