This is the crown jewel. Rumors persisted for years that a tenth scenario was cut due to page count. The PDF exclusive officially restores "The Silence of Siberia" —a 22-page cosmic horror investigation set inside the Tunguska event zone, where the laws of physics have collapsed entirely. This chapter is only legally available in the PDF exclusive.

In the realm of Call of Cthulhu, investigators typically tread the foggy streets of Arkham or the decrepit villages of England. Day of the Beast breaks this mold dramatically, transporting players to the rugged, sun-drenched frontier of 1840s California. As a PDF-exclusive offering (often found through digital distributors like DriveThruRPG), this scenario offers a unique blend of historical grit and Lovecraftian horror, challenging investigators to survive not only the Mythos but the harsh realities of the American West.

The story begins in the summer of 1927 and takes investigators on an episodic journey through 1929, leading up to the edge of the Great Depression. Roleplayer Guild

The Ultimate Guide to the "Call of Cthulhu: Day of the Beast" Campaign

: The scenario is designed to be adaptable to different player counts and skill levels. It offers a range of challenges, from combat and investigation to puzzle-solving and diplomacy, allowing players to choose their approach to overcoming obstacles.

Chaosium has undergone significant changes in licensing over the last decade. While many current titles (7th Edition) are widely available, Day of the Beast is a 5th/5.5th Edition relic. The "exclusive" PDF is typically only available through two channels: