2010 · Sourcebook (rules/options to enhance play)
Detectives: Investigation Sourcebook for d20
A d20 sourcebook for running investigation campaigns inspired by crime dramas, thrillers, and murder mysteries. It provides guidance on structuring mysteries, placing clues, managing contacts, pacing investigations, using red herrings, and keeping plots moving without revealing their solutions. The book includes investigation plot hooks, 100 conspiracies, six sample villains, 17 random-encounter NPCs, seven advanced classes, and new skills and feats for investigators. Advice and examples cover urban crime, psychological suspense, secret agents, and other investigative scenarios.
Skill Based (buy or gain skills)Attribute/Stat Based (STR, CON, PER, etc)Level Based (Earn XP and level up)
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Game facts (players, playing time, age, credits) from BoardGameGeek.