1610. All of Europe teeters on the brink of war. Religious and political factions maneuver for advantage. In the scramble for power, lost knowledge is brought to light, and discoveries from the New World change our conceptions of reality. But there are some things man was not meant to know… The Heydelburg Horror is the first part of a new campaign for Clockwork & Cthulhu. A Clockwork of Orange will take the agents of the Karolinium in Prague across Europe to the dark secret at the heart of the Holy Roman Empire. Requires the Clockwork & Chivalry Core Rulebook, 2nd Edition.