Civilization 4 is the most successful series of Sid Meier's Civ: the handling is easy, IA offers a good challenge solo, creating maps has been greatly improved, the interface is more ergonomic. We can finally trust the automation of tasks workers. This release includes the original game plus two extensions: Warlords, a set of scenario and a large number of new units; and Beyond the Sword adds new features, some units and a number of mods that may stray drastically from the original game, be it for gameplay or design of the units.
