2013 · 资料书（用于增强玩法的规则/选项）
Underground Adventures
This supplement explores underground settings, from historical beliefs about Earth’s interior to modern scientific information and speculative ideas. It covers the hazards of subterranean travel, including limited senses and movement, air and water, and different types of caves. It provides five explorer templates, equipment and vehicles, new Talents, techniques, and spells, along with species descriptions and game statistics for fantastic underground creatures. Guidance for creating subterranean locations and campaign seeds supports adventures beneath the surface.
技能型（购买或获得技能）基于点数（分配点数以获得技能、能力等）骰子（主要为 d6）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Underground Adventures
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。