2018 · 资料书（用于增强玩法的规则/选项）
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.
技能型（购买或获得技能）基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。