2001 · 资料书（用于增强玩法的规则/选项）
Primal Codex
A d20 roleplaying supplement focused on primitive-themed settings, drawing on research and folklore from ancient Africa, Australia, Polynesia, and the Americas. It provides adaptable material for races, cultures, religions, lands, languages, and other campaign elements, with details kept intentionally open so groups can expand or alter them. The content also draws on biology, anthropology, and related sources, while prioritizing rules and setting tools over standard background entries.
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 Primal Codex
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。