2018 · ソースブック（プレイを拡張するルール／オプション）
The Echo
This anthology collects five Golden Age comic-book adventures featuring a star college athlete and master ventriloquist who becomes involved in revenge, crime-fighting, and deadly encounters with mad scientists. The stories combine pulp action with horror and introduce the hero’s previously unknown siblings. The book also includes d20 System feats and talents for weaponizing ventriloquism, game statistics for three inventions created by the hero’s scientist brother, and tables for generating adventure ideas involving mad scientists.
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。