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This subject is written on a topic in the real world and reflects factual information. This subject contains information from the Expanded Cthulhu Mythos, and not based on H.P. Lovecraft's works directly. Call of Cthulhu: 1920s Investigator's Companion is a sourcebook for Chaosium's Call of Cthulhu roleplaying game. It was first released as a paperback book, but is now only available in PDF format.


From the publisher's website:

When faced with the horrors of the Cthulhu Mythos, investigators need all the help that they can get. This essential player's aid for Call of Cthulhu provides it.

The 1920s Investigator's Companion is split into four sections. "The Roaring Twenties" details life in the 1920s, from a general historical overview to listing of favorite songs, books, and films of the era. "On Becoming An Investigator" details the trials of becoming an investigator, offers 140 different occupations, and annotates the use of skills in the 1920s. "The Tools of the Trade" lists resources investigators may use for research, describes various forms of transport and transportation, and also catalog other equipment and weapons. "Words of Wisdom" brings the book to a conclusion by offering advice to the intrepid investigator. Now, for the first time, everything a 1920s investigator needs is gathered in one place.


Part One:‰ The Roaring Twenties[]

  • An Overview of the Jazz Age
  • Chronology of the Twenties

Part Two: Becoming an Investigator[]

  • Playing an Investigator
  • 1920s Occupations
  • How to Create Your 1920s Investigator
  • 1920s Skills

Part Three:‰ The Tools of the Trade[]

  • Research &‰ Resources
  • Newspapers from Around the Globe
  • Consultants
  • Transport &‰ Travel
  • Equipment &‰ Arms
  • 1920s Sample Gear &‰ Prices
  • A‰ Selection of Handguns
  • Firearms Table

Part Four:‰ Words of Wisdom[]

  • The Professional Investigator
  • Tips From a Pro
  • 1920s Forensic Arts
  • Index of Professions
  • Character Sheet (Front)
  • Character Sheet (Back)