The Power of the Atom is a Fallout 3 quest. It is also a PS3 trophy, and an Xbox 360 and PC achievement. In the quest, the Lone Wanderer is given the choice of disarming or detonating an atomic bomb, thus deciding the fate of a town and its inhabitants. The quest is considered to be one of the best in Fallout 3, and has been described as "game-defining."