|There is more information available on this subject at Electronic Entertainment Expo on the English Wikipedia.|
The Electronic Entertainment Expo, commonly known as E3, is an annual trade show for the computer and video games industry presented by the Entertainment Software Association (ESA). It is used by many video game developers to show off their upcoming games and game-related hardware.
E3 is widely regarded as the world's largest regular convention for video games. Video game companies generally spend more on their presentations for E3 than any other convention (including fancy decorations and pyrotechnics). Major video game critics often have a "best of E3" award session (similar to end-of-year award sessions), and only E3 consistently features such awards.
Many major Halo announcements have taken place at E3, including:
- E3 2000: The Halo: Combat Evolved Announcement Trailer was shown.
- E3 2002: The Halo 2 Announcement Trailer was shown.
- E3 2003: An early Halo 2 trailer was revealed: the Halo 2 E3 Demo.
- E3 2004: The first Halo 2 multiplayer level was revealed to the public. That level was Zanzibar.
- E3 2006: The Halo 3 Announcement Trailer was unveiled to the world at E3 2006. Though Halo 3 was the expected game title, it was not expected to be announced at E3.
- E3 2007: Fans got their first real glimpse at the Halo 3 campaign thanks to the release of the Halo 3 E3 2007 Trailer.
- E3 2008: A demo was shown of Ensemble Studios' Halo Wars, and the Five Long Years Cinematic was released. Bungie was originally going to announce Halo 3: ODST at the conference, though Microsoft had decided to postpone the announcement until a later date.
- E3 2009: Bungie showcased Halo 3: ODST and announced Halo: Reach.
- E3 2010: Fans got their first glimpse at the Halo: Reach campaign in the Halo: Reach E3 Campaign Demo.
- E3 2011: Halo 4, Halo 5: Guardians, Halo 6, and Halo: Combat Evolved Anniversary were announced. The Halo 4Announcement Trailer was also shown.
- E3 2012: A Halo 4campaign demo and a teaser for War Games and Spartan Ops are shown.
- E3 2013: The Halo 5: Guardians teaser trailer is shown.
- E3 2014: Halo: The Master Chief Collection is announced along with the Halo 5: Guardians multiplayer beta. Along with campaign and multiplayer footage, a trailer for the Master Chief Collection and another for the Halo: 5 Guardians multiplayer beta were shown.
- E3 2015: A campaign gameplay demo for Halo 5: Guardians is unveiled. The multiplayer gametype Warzone is shown off for the first time.