The initiate kills Attis, and flees the Vault's self-destruction sequence. Thanks to the survivors in the vault, the initiate is able to once again find Attis, who has now mutated into a giant blob creature. After heading to the vault, the initiate learns of a massive army of mutants, and fights the mutant general Attis, but is seemingly defeated and left for dead.

Rhombus has the initiate kill the cult leader Blake, and the initiate finds a key card to a secret Vault. A cult called the Church of the Lost is found, along with a Brotherhood paladin named Rhombus. After dealing with the raiders, the initiate(s) heads to the city of Los. But things derail as the city's Mayor sells the town out to raiders, who immediately begin their siege. At first, the player's mission is to find out what happened to several missing Brotherhood paladins in the city of Carbon. The game revolves around an initiate (or group of initiates) of the Brotherhood of Steel, who are chosen from several playable characters. Story Carbon, the first town in the game.

Not to be confused with Fallout Tactics: Brotherhood of Steel, which is an entirely different game, Fallout: Brotherhood of Steel is an action variant of the popular RPG franchise that received pathetic scores from critics, was received angrily by fans who preferred the turn-based gameplay of the original and was even wiped from series canon by embarrassed designers.

Brotherhood of steel concept art