2005 · 资料书（用于增强玩法的规则/选项）
Blood and Secrets: A Superagent Sourcebook for Modern
A sourcebook for modern d20 campaigns centered on government superagencies, drawing on spy fiction, comics, science fiction, and horror. It adds seven agent classes, including medic, protector, analyst, leader, assault, covert, and double agent, along with new feats, advanced training, and an agency rank system. The book also presents the U.S.H.E.R. Dossiers as a campaign model for running superagent adventures.
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 Secrets: A Superagent Sourcebook for Modern
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。