Here you have it guys, Microsoft E3 HALO: ODST trailer, the game will be release this September and will include the beta for HALO: Reach. Trailer after the break.

[Show as slideshow]

[View with PicLens]

HALO: ODST will retail for 60 dollars and here is a list of the included content according to information released by Microsoft to the press today:

• Halo 3 ODST Campaign, which puts the player in control of different characters in New Mombasa during the events leading up to Halo 3.
• Halo 3 ODST “Firefight” mode, “a new cooperative multiplayer* mode where up to four players can assume the role of an ODST squad and fight together to take on increasingly challenging waves of enemies.” Also: “As an ODST squad, you will face increasingly challenging waves of enemies together, striving to earn the highest scores possible, while various “Halo 3″ “Skulls” are progressively activated.” 
• Three new Halo 3 multiplayer maps on a standalone disc
• The more than 20 downloadable maps previously released for Halo 3 in the Legendary, Heroic and Mythic map packs.
• A key to the forthcoming multiplayer beta for the fall 2010 Bungie game Halo: Reach

The new game is also said to support all of Halo 3′s main features, including four-player co-op, campaign scoring, screenshots and Forge multiplayer map editing

In addition, Microsoft will sell a $99 Collectors Edition of Halo 3 ODST that ships with the above elements and an exclusive ODST Xbox 360 controller.