With the power and splendor of Egypt growing, its influence now reaches far beyond its borders. Seth, the god of conflict, demands that you subdue Canaan, and declare war on the mighty Hittite Empire. Your soldiers are to march on any land that dares defy you or poses a threat to your kingdom. It is the time to muster your armies, gather your priests, obtain mighty artifacts and secure the favor of a powerful cult to pave your way into even greater victories.

Tekhenu: Time of Seth introduces new layers of interaction and new options to Tekhenu: Obelisk of the Sun. A new board opens up options of conquering neighboring lands to gain in-game benefits, as well as new scoring opportunities. New dice allow for the mustering Soldiers and gathering priests. However, conquest comes at a price, as with more battles fought, balancing one's deeds becomes more complicated than before.

Apart from soldiers needed to take control of lands beyond the borders of Egypt, players must also gather priests that allow them to take control of artifacts. These new cards offer new and nuanced ways of planning turns, combining strategic plays and gaining victory points.

The expansion also comes with advanced rules specifically designed to enhance the 2–player experience.