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.
- The name of the song is a reference to the book To Kill a Mockingbird by Harper Lee.
- It contains a variation of the Halo Theme, played shortly after the "This is Our Land" section, and a remake of Under Cover of Night with the rhythm of Farthest Outpost and Roll Call at the end of the track, heard in-game during the approach to the gates of Voi.