2009 · 资料书（用于增强玩法的规则/选项）
D20 Rules Options: Volume #1, Second Edition
A rules supplement for d20 fantasy and modern games, providing optional systems and advice for Games Masters. It introduces revised damage rules, Spellcraft checks for all magic users, and an armor system based on damage reduction and class-linked armor bonuses. Additional sections cover experience point awards for role-playing, penalties for disruptive player behavior, and other ways to add realism and structure to a campaign. This is an Open Gaming License product.
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 D20 Rules Options: Volume #1, Second Edition
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。