Released

Released is a song from the Halo 3: Original Soundtrack. It plays during the level. It includes the tracks Released, Wild Life, and Another Walk.

It starts with a single low note, followed by a section of drums. After that, another layer of high strings is added in. At around 0:50, choir takes on the main melody of Impend from Halo 2.

Later on, drums once again become the dominant instrument. At around 3:05, the slow drum beat is replaced by a faster and louder drums section.

At around 4:30, the percussion changes to a more relaxed beat, with a more muted drum tone. The choir then joins in again for the melody of A Walk in the Woods.

It runs for 5:20.
 * Released is a remake of the second part of Impend from the Halo 2 OST, and Another Walk is A Walk in the Woods/Heretic, Hero remake.