"Crusader Kings" is a grand strategy video game series developed by Paradox Interactive. Players take on the role of a noble family during the Middle Ages, managing their dynasty, territory, and relationships. The game emphasizes political intrigue, warfare, and the complexities of feudal society, allowing players to shape the course of history through their decisions. In "Crusader Kings," players can engage in various activities, such as forming alliances, waging wars, and arranging marriages to secure power. The game features a dynamic world where characters have unique traits and ambitions, making each playthrough distinct. Key elements include dynasty management, political strategy, and historical events.