2005 · ソースブック（プレイを拡張するルール／オプション）
Mastering Iron Heroes
This rules supplement explores the high-action fantasy system in detail, explaining how its mechanics work and how they can be adapted. It provides new options, expanded concepts, and additional material for heroic combat characters and campaigns. Design commentary examines how rule changes affect play and offers guidance for applying them during character creation, encounter design, and campaign planning.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）
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。