To Kill a Demon is a song included in the Halo 3: Original Soundtrack. It plays during the level Tsavo Highway, and includes the tracks To Kill a Demon, Ancient Dust, Punch Through, and Underestimated. The beginning of the song has the same melody as the middle part of "This is our Land," and is heard during the battle with the Phantoms in the canyon after the broken bridge. It runs for 3:45.