2006 · 战役设定（游戏世界）
Ptolus: Beneath the Streets
This fantasy roleplaying supplement explores the subterranean world beneath the city, including an ancient labyrinth, the Undercity, sewers, a dwarven ruin filled with treasure and traps, and natural caverns inhabited by dangerous creatures. It provides locations and details for adventures below the streets, and can be used on its own in city-based d20 campaigns or alongside the other volumes in the series.
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 Ptolus: Beneath the Streets
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。