Believe

"A hero is more than a person, a hero is a belief. A belief that, against impossible odds, the world can be saved—and that the world is still worth saving. Heroes inspire that belief in us. They renew our faith and give us that most precious of all gifts—hope. The world needs heroes. That's why, when a true hero arrives, the world will honor him."

- Xbox.com introduction of "Believe". "A hero need not speak. When he is gone, the world will speak for him."

- Magazine Ad "He's received the highest commendations for bravery. Countless decorations for honor and selflessness. But Master Chief's greatest achievement reaches far beyond what any medal could ever hope to commemorate. For the men and women of the 26th Century, he is a human embodiment of possibility, the last Spartan standing against an angry tide. This strength of spirit is forged through his legend. Jericho VII. The Battle of Reach. High Charity. Tales rife with sacrifice and courage. Tales that grow, flourish, and inspire. And while he shapes his own history, he in turn shapes the history of all who follow. For no matter what horrors are released upon the day, they cannot match the reply of soldiers emboldened with his spirit, an army of Master Chiefs unto themselves."

- Magazine Ad Believe is a Microsoft marketing campaign for Halo 3 produced by New Deal Studios. It features the word "Believe" as a tagline, and appears to be honoring the legacy of SPARTAN-117, citing him as a hero of the United Nations Space Command whose brave actions inspired other servicemen during the Human-Covenant War.

It includes handouts, live-action TV commercials, magazine page advertisements, and Xbox live marketplace ads.

Websites
(Note the Websites are defunct now. Anything that can be found is either on its relevant page or on this page)
 * Diorama - An interactive flash movie, a part of the Believe campaign for Halo 3. It is a fly through of the John-117 Monument, and was be viewed at the Halo 3 website.
 * On Xbox.com, there was a collection of photographs from war photographer Jake Courage titled "Shooting a Hero".

Trailers

 * Testimonials - These were a set of 4 videos showcasing veterans of the Human-Covenant war reminiscing over the Second Battle of New Mombasa.
 * Museum - A live-action TV commercial featuring Retired Major Pawel Czernek, a UNSC veteran that fought in the Battle of New Mombasa alongside SPARTAN-117, reminiscing of his memories of the inspiring hero.
 * Hunted - A live-action TV commercial.
 * Enemy Weapon - A live-action TV commercial.
 * Gravesite - A live-action TV commercial that explores the battleground and talks of Spartan 117's "death".


 * Diorama - There were two videos made focusing on the Diorama itself.
 * Believe: The John 117 Monument - A live-action online video, describing the in-universe construction of the memorial diorama.
 * Diorama - A video showcasing several parts of the diorama.


 * Shooting a Hero - A trailer detailing the photos of John-117 that Jake Courage took.
 * Making of Shooting a Hero - Making of the photos for the art gallery and Xbox.com site.

Events

 * Believe - A pamphlet distributed at the Project Revolution musical festival, featuring in-universe musical presentation of the UNSC Symphony Orchestra.
 * Believe Plaques - Plaques were displayed in several locations. The dates on some of these plaques are canonically incorrect, describing Human-Covenant War events involving John-117 happening in mid-2553 and later, despite the fact that the war had ended and John was Missing In Action by that time.
 * Art Galleries - Several photographs were shown in art galleries in the UK that were photos by Jake Courage.

Production notes

 * The creators of the campaign were not informed of the story of Halo 3, leading to multiple inconsistencies with the narrative depicted in Believe and the game's story. However, according to Jeff Easterling on September 9, 2018 it was canon "for now".
 * Stan Winston Studio was responsible for the diorama featured in the Halo 3 Believe ads.
 * The melody that was used in the Believe commercials was created by Polish pianist Frédéric Chopin and is called "Preludes #15, Raindrop".