2015 · 资料书（用于增强玩法的规则/选项）
Master Key
This volume collects five Golden Age comic stories about Ray Cardell, an amateur astronomer transformed by a mysterious ray from outer space. As Master Key, he uses heat vision, X-ray vision, metal-melting eye beams, and mind control while fighting crime. The book also includes an expansion for the OGL d20 Modern superpowers system, with rules for vision-based abilities and a character-generation adjustment for creating more superheroic characters.
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 Master Key
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。