2017 · 资料书（用于增强玩法的规则/选项）
Celestial Mechanics
A rules supplement for d20-based roleplaying games that adds narrative control without changing existing character creation, combat, magic, or other rules. For actions not covered by the core system, players choose a bid die from d4 to d12 to set the potential benefits and complications, then roll a d20 with the relevant modifiers. Results of 11 or higher succeed, while 10 or lower fail. Even totals let the acting player describe the outcome; odd totals give that control to the gamemaster. Successful and failed actions are tracked with complications, reducing the gamemaster’s narrative workload.
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 Celestial Mechanics
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。