In the aftermath of the Great War, Berlin maintains a reputation for licentiousness. A place where anything can be had for the right price. It is a city of both hedonism and business; its streets overflow with disabled veterans, prostitutes, destitute immigrants, and political agitators""all rubbing shoulders with buttoned-down businessmen, scholars, and artists. The gutters run with the blood of political assassinations, where Communists and vlkisch Nationalists clash with each other and the police. Long into the evenings, Berlin's world-famous cabarets offer music, dance, and titillating entertainment in stark contrast to the gray buildings that run on for endless miles along the sprawling city's byways.Into this bubbling stew, Berlin: The Wicked City introduces the weird elements of the Cthulhu Mythos""a hotbed of secret organizations, sinister cults, and half-whispered lore. Amid the wicked air of the world's capital of sin, the very nature of what it means to be human is questioned. And as the city hurtles toward its inevitable dark destiny, the oppressive atmosphere pushes the sanity of investigators to its breaking point. This book presents an overview of 1920s Berlin as it would be experienced by visitors and residents of the time. Guidelines are presented for creating investigators for Berlin-centric campaigns, as well as investigator organizations to help bind groups together. Find notable personalities, key locations, and a system for generating details of the urban landscape on the fly. With the city's crime and punishment, underworld, and high culture detailed, the tools provided help the Keeper gain an understanding of what makes Berlin unique""and dangerous. Three scenarios, spanning the history of Berlin between the end of the Great War and the rise of Adolf Hitler and the Nazi Party, contain colorful details of Berlin and its inhabitants, and may be run as stand-alone adventures or linked together to form a mini-campaign.