Set in an alternate-history version of London in the year 2237, Fallout: London takes players far from the familiar ruins of America and into a city transformed by the aftermath of nuclear war. Awakening as an escaped test subject, the protagonist is thrust into a web of political intrigue, rival factions, and long-buried conspiracies that threaten the future of Britain's capital. As they journey across iconic landmarks reclaimed by survivors, they encounter powerful organizations, eccentric communities, and dangerous mutants unique to the setting. Every decision shapes alliances, rivalries, and the balance of power in a society struggling to rebuild from catastrophe. Blending dark humor, moral ambiguity, and rich world-building, the story explores themes of class, authority, and survival through a distinctly British lens. With multiple paths and meaningful choices, the player's actions ultimately determine the fate of London and the people fighting to define its future.