2012 · 核心规则（开始对局的最低要求）
Ouroboros Tabletop Roleplaying Engine, Fourth Iteration
A rules engine for tabletop roleplaying in fantastic worlds, supporting fantasy adventures with light rules, tactical choices, and flexible stakes. When a significant action calls for a roll, the Guide outlines the objective, potential consequences, and possible outcomes. The player rolls a number of twenty-sided dice based on the relevant skill, with each die matching or rolling below the applicable attribute counting as one success.
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）基于属性/数值（STR、CON、PER 等）
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游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。