2006 · 资料书（用于增强玩法的规则/选项）
Prototype: Master of the Underworld
This 8-page PDF presents the Master of the Underworld, a masked criminal genius who serves as a nemesis for pulp heroes. It details his hidden identity, criminal resources, unusual tactics, and weapons created through weird science. Designed for Game Masters, the supplement adds depth to d20 pulp campaigns, including settings such as Haven: City of Bronze.
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）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Prototype: Master of the Underworld
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。