2003 · 资料书（用于增强玩法的规则/选项）
From Stone to Steel
This d20 system guide examines weapons, armor, tactics, training, and special materials from the Stone Age through the Renaissance. It presents equipment alongside its historical and cultural context, including methods of use, advantages, and drawbacks. The book also adds feats, skills, prestige classes, mechanics, spells, mythical items, fantastic materials, and suggestions for incorporating historical and legendary equipment into fantasy campaigns, including items associated with fantasy races.
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 From Stone to Steel
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。