For almost 30 years the battle between the forces of humanity and the Convenant, an aggressive collection of alien species, has raged across the galaxy. Countless moments of bravery and danger have made heroes on both sides of the war, but above all others stand the Spartan super-soldiers and their leader: the Master Chief, John-117.

Spartan ODST (Blue): The Orbital Drop Shock Troopers (ODST) are the best of the best for the UNSC Marines... these battle-ready troopers are eager to join combat, and often beat their more heavily-armored comrades-in-arms to a planet's surface via their near-orbit delivery modules, which rocket them with pinpoint accuracy to any battle zone.

Arbiter (Active Camouflage): The Sangheili (Elites) are a proud warrior race, and in times of great conflict they are represented by one warrior promoted to the rank of "Arbiter". This promotion is both an honor and a curse, however, as Arbiters rarely survive their dangerous missions...