2014 · 资料书（用于增强玩法的规则/选项）
Underterror
This Pathfinder Roleplaying Game supplement introduces the underterror base class and the savant of HEL archetype. Designed for gitwerc characters in Aventyr’s Underworld, these characters use infernal contracts and extreme bodily mutations to infiltrate society before revealing their monstrous forms and overwhelming their enemies.
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 Underterror
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。