2018 · ソースブック（プレイを拡張するルール／オプション）
Steam and Shellfire
A reference guide to the extraordinary technology of the Steam Age, rooted in late-18th- through early-20th-century possibilities. It covers steam power, telegraphy, tools, armor, weapons, powered armor, speculative firearms and ray guns, calculating machines, mechanical men, and other forms of mad science for heroes and villains to use or invent. The material supports settings featuring Difference Engines, clockwork carbines, and experimental potions.
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。