2005 · 资料书（用于增强玩法的规则/选项）
Klingons d20: The Empire Of Steel (Complete Imperial Data File)
A d20 sourcebook covering the history, culture, government, military, religion, law, and technology of the Klingon Empire. It includes profiles of Klingon society, intelligence agencies, secret police, Imperial Paladins, military nobility, and subject races. The book provides data on 23 star systems, more than 100 planets, over 100 starship types and variants, weapons, equipment, medals, rank insignia, and deck plans for a fast patrol ship. It also includes an adventure involving a deal on Verlix Station and an experimental project led by Lieutenant Thirek.
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 Klingons d20: The Empire Of Steel (Complete Imperial Data File)
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。