2017 · 资料书（用于增强玩法的规则/选项）
Underworld Kingdom Volume Three: Untold Monstrosities and Eldritch Artifacts
A campaign booklet for Underworld Kingdom adds dozens of new monsters, including demons and prehistoric beasts, with stat blocks for use in play. It also includes 25 magic items, random tables for generating various items, and additional content.
基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）职业制（飞行员、巫师、科学家等）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Underworld Kingdom Volume Three: Untold Monstrosities and Eldritch Artifacts
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。