2002 · 资料书（用于增强玩法的规则/选项）
The Complete Guide to Doppelgangers
A world-neutral roleplaying sourcebook about doppelgangers, covering their origins, social structure, life stages, relationship with mimics, and infiltration of human society. It includes new feats and skills, the Protean Warrior class, campaign ideas centered on doppelgangers, variant monster statistics, and supplemental online material.
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 The Complete Guide to Doppelgangers
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。