2011 · 资料书（用于增强玩法的规则/选项）
Guide to Rocket Rangers (Ubiquity)
This supplement introduces an elite US rocket-pack unit operating a few years after the events of Hollow Earth Expedition, along with its SS counterparts. It provides unit details and game statistics, rules for using rocket-packs, two weird science weapons, and adventure seeds for Ubiquity campaigns.
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 Guide to Rocket Rangers (Ubiquity)
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。