When Halo 3: ODST drops this Sept. 22, it will deliver a completely new campaign, a new cooperative multiplayer experience called Firefight, the complete Halo 3 multiplayer experience on a standalone disc, and new competitive multiplayer maps.

Microsoft and Bungie revealed the remaining three multiplayer maps for Halo 3: ODST – Heretic, Citadel and Longshore:

• Heretic returns players to the Halo 2 arena Midship. Heretic’s symmetrical spaces require players to execute complex strategies in order to outplay their opponents.
• Citadel is a long abandoned Forerunner stronghold, but its small and symmetrical. Two opposing bases offer little safety for players. Instead, Citadel forces small squads to stay in constant communication, keep their heads on a swivel, and be prepared to adjust combat tactics in close quarters.
• Longshore is designed for large scale combat and well suited for smaller affairs, Longshore’s multitude of industrial buildings, elevated walks, and open inlets conspire to create a complex battleground tailored for multiple combat scenarios.

In addition to a brand new campaign, Halo 3: ODST introduces a new cooperative multiplayer mode called Firefight which allows Halo fans to experience co-operative gaming in a whole new way: they will be fighting as members of an ODST squad against waves of increasingly challenging enemies across a variety of battlefields. This experience is made even more intense with the integration of Halo 3’s skulls, which progressively activate as time goes on to alter the gameplay and up the challenge. Players will battle through wave after wave in search of high scores, Achievements and bragging rights.

Halo 3: ODST also includes a second standalone disc with three new Halo 3 multiplayer maps, all original Halo 3 maps, as well as the Legendary, Heroic, and Mythic Map packs for a total of 24 maps.

Purchasing Halo 3: ODST will ensure Halo fans get access to the Halo: Reach multiplayer beta when the beta goes live in the future. Announced at E3 2009, Halo: Reach is the prequel to the Halo trilogy and is scheduled for release in fall of 2010.