In the ruins of old Boston, the Commonwealth settles in for a long, deadly winter. As its hungry communities do their best to find food and survive the cold, a new sect of the Church of the Children of Atom arrives. Their flock grows as they spread their worship of nuclear division and radiation across the region. Led by an enigmatic prophet calling himself the Last Son of Atom, the Church's army plans to ignite an all-out winter war with the settlements that dare reject their atomic god. A group of ragtag survivors must do whatever it takes to protect their communities and keep the Commonwealth from becoming ground zero... again.

Winter of Atom's themes include exploring frozen wastelands, harsh winter survival, building relationships with communities, explosive action against terrifying monsters, high-stakes warfare against a relentless foe, and weird and unexplainable supernatural horrors.

Within the 248-page Winter of Atom quest book you will:
Face a fearsome sect of the Children of Atom, led by the Last Son of Atom, in an action-packed, open-ended and non-linear sandbox questline that can take characters from level 1 - 21.
Meet brand new groups of survivors, from beatniks and circus big tops, to traveling casinos and religious weaponsmiths.
Create characters with new origin options: Generation 3 Synths, Protectrons, and Children of Atom.
Enhance your game with new rules for surviving the harsh winter and gaining reputation with settlements. Learn how to design balanced combat encounters, and find new rules for surviving defeat, quickly adjusting an encounter's difficulty, and creating Minion NPCs.

This book requires the core rules found in the Fallout: The Roleplaying Game Core Rulebook but could be played using the rules and pregen characters found in the Fallout: The Roleplaying Game Starter Set.