2005 (real world)

In 2005, is the year 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: Halo 2 Auto-Update 2 was released.
 * April 25: 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: The Halo 2 Multiplayer Map Pack and Maptacular Pack for Halo 2 were released.
 * July 20: 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.