One Final Effort

One Final Effort is a soundtrack included in the Halo 3: Original Soundtrack. It is heard on the campaign level The Covenant when John-117 faces the two Scarabs. It is the third movement of the Covenant Suite.

This piece seems to be a remake of Unyielding from the Halo 2: Original Soundtrack. Also, a large part of this song is taken from a part of the Truth and Reconciliation Suite.

A different version, one that is more true to the original Halo Theme is also featured during the Warthog escape in the final level of Halo 3. That version also uses the iconic choir chant used for the main menu, during the piano climax when the theme is in full swing.

It runs for 3 minutes and 08 seconds.

Trivia

 * At the end of the level High Charity the Prophet of Truth can be heard saying "If you are to falter know this: One final effort is all that remains." This may imply that the Prophet of Truth is encouraging the last troops of High Charity to commit suicide rather than be killed by the Flood, though this would not prevent infection, or it could refer to the activation of Installation 05. This line originates from dialog recording sessions conducted pre-Halo where Jaime Griesemer is directing Jason Jones in a painful attempt at a Scottish accent. An MP3 of the clip is available on Bungie.net media player
 * Additionally, at the end of the level Tsavo Highway, Lord Hood tells the Marines "One final effort is all that remains." He is referring to the final defeat of the Covenant. Incidentally, this soundtrack plays during the battle outside the Ark's Citadel, regarded as the Covenant's last stand. As such, this track plays during humanity's 'final effort' to defeat the Covenant.
 * One Final Effort was covered by the London Philharmonic Orchestra in their 2011 album The Greatest Video Game Music.