Halo 3: ODST is a first-person shooter for Xbox 360 that serves as a side story to Halo 3. Developed by Bungie, players step into the boots of an Orbital Drop Shock Trooper (ODST) in the streets of New Mombasa, experiencing a more tactical and stealthy gameplay compared to the mainline Halo games. With a darker tone, it incorporates a noir-inspired narrative, focusing on the ODST squad searching for clues to find their missing teammates. The game also introduces Firefight mode, where players fend off waves of increasingly challenging enemies.