2009 · 场景 / 冒险 / 模块
Hollow Earth Expedition Free RPG Day Adventure 2009
A free introductory adventure for the Hollow Earth setting, distributed for Free RPG Day in 2009. The book explains character creation and the Ubiquity System, then provides a sample scenario, "Kidnapped in the Hollow Earth," for play.
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d2/硬币）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Hollow Earth Expedition Free RPG Day Adventure 2009
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。