Halo 3: ODST (formerly Halo 3: Recon) by Microsoft for the Xbox 360 is an FPS in the Halo saga that lets people experience events leading up to the story told in Halo 3 through the eyes of an ODST (Orbital Drop Shock Trooper), as they search for clues leading to the whereabouts of their scattered squad and the motivations behind the Covenant's invasion of New Mombasa. ODST introduces Firefight, 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 included are a total 24 maps, including three new Halo 3 multiplayer maps, all original Halo 3 maps, and the Legendary, Heroic, and Mythic map packs.