2017 · 替代规则（核心规则变体）
M20 Fifth: Adamantine Edition
A compact, streamlined fantasy role-playing game designed for quick and easy play. It uses the familiar rules framework of Fifth Edition while retaining access to its monsters, spells, adventures, and equipment without conversion.
基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）骰子（主要为 d20）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 M20 Fifth: Adamantine Edition
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。