The product is a role-playing game (RPG) sourcebook called "Metropolis - Legions of Darkness" produced by metropolis ltd. in the United States. This book is designed for fans of the Kult RPG . With a focus on the dark and sinister aspects of the Metropolis setting, players can delve deeper into the world of crime, corruption, and supernatural forces. As an expansion resource for the game, this sourcebook offers new challenges and opportunities for players to explore the gritty underbelly of the urban jungle.