Much more than an expansion, Halo 3: ODST allows players to explore dangerous new ground,
search the dark, abandoned streets of New Mombasa for clues,
and fight back against the Covenant invasion from multiple perspectives.
Dropping in as "the rookie," a new member of an elite squad of Orbital Drop Shock Troopers
sent into New Mombasa on a classified recon mission, you'll be armed with specialized
weaponry and upgraded technology, including silenced weapons and a VISR enhanced vision mode.

Separated from your squad, you'll have to scour the city for clues in order to learn,
what happened to Buck, Dare, Dutch, Mickey, and Romeo. As you collect new clues,
you’ll experience the story from their perspectives, fighting through the occupied city hours earlier.