Civilization IV needs no introduction. It is the latest installment of the revolutionary historical turn-based strategy series created by Sid Meier (Railroad Tycoon, Sid Meier's Pirates!, Colonization, Alpha Centauri) in 1991, a series that has earned more accolade and awards than we could possibly list here.

From stone age to space age, your civilization struggles for supremacy. Wars, religion, government -- all decisions are yours. Guide your people from early prehistory into the stars. Plan your every move, play enemies and allies off one another, and become an empire whose foundations extend into the mists of human history. And with the Warlords expansion pack, there's more to do than ever before.