Old World: The Sacred and The Profane is a simulation game that immerses players in the complexities of ancient civilizations and their religious dynamics. This expansion introduces over 350 new events, allowing players to navigate the intricate relationship between governance and faith. The gameplay emphasizes strategy as players must manage the expectations of various religious factions while developing their empires.

In addition to the rich narrative content, players can recruit new historical characters that bring unique abilities and insights into the game. The expansion enhances the overall experience by challenging players to balance their political ambitions with the spiritual needs of their populace, making each decision crucial for the survival and prosperity of their empire.