2004 · 资料书（用于增强玩法的规则/选项）
Blood and Circuits
This d20 roleplaying supplement focuses on characters who design, build, and use advanced technology. It introduces new advanced classes, feats, expanded skills, and combat options for inventors, engineers, armorers, gadgeteers, and other technically minded heroes. An optional crafting system uses Invention Points to create weapons, armor, computers, vehicles, robots, headquarters, and other equipment. Additional material supports strange scientific achievements and includes appendices for Blood and Vigilance and Darwin’s World Second Edition.
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 Blood and Circuits
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。