Halo 3: ODST Original Soundtrack released on the 22nd of September in 2009. Launching together with the game, ODST’s soundtrack as well as the game was a completely different approach compared to Halo. With a new story and a new protagonist, Martin O’Donnell and Michael Salvatori went for a more human sound. No cyborgs, and no mysterious choir.
The Saxophone and the Rain you hear throughout the game are part of the “Noir” feeling O’Donnell was pushing for. With the Rookie alone in the rain trying to find his teammates in a deserted city this approach certainly worked.