2016 · ソースブック（プレイを拡張するルール／オプション）
Meltdown and Fallout
This sourcebook covers nuclear reactors, radiation, and the hazards surrounding a meltdown. It explains reactor types, fuel sources, security, radiation measurement, protection factors, specialized equipment, and related GURPS mechanics. It details the events during and after a meltdown, including long-term effects, and provides radiation-related traits, skills, advantages, and disadvantages for characters. Guidance supports modern, historical, magical, and futuristic campaigns, with power-plant complications, adventure seeds, campaign ideas, and references to additional books and films.
スキルベース（スキルを購入または獲得）ポイント制（ポイントを割り振ってスキルや能力を得る）ダイス（主にd6）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。