Note: Sid Meier's Civilization IV is no longer under development and the developer provides no support for it.

With Civilization IV, history as you know it, is history. Rule throughout time and create your own legacy as you guide your civilization from the dawn of man through the space age and beyond. Implement new technologies, conduct diplomacy or wage war to grow your society and become the most powerful leader the world has ever known. Features include:

• 3D Living World: Detailed environments where animals roam and smoke billows from small huts, set in a vibrant and colorful world. Overhauled InterfaceRTS style, intuitive interface allows you to manipulate units and cities with greater control and faster speed.
• Multiplayer: Built from the ground up for multiplayer with Era Starts, variable game speeds, hot join, team play and a bevy of connectivity options: Internet, LAN, Play by Email (PBEM), hot seat and more. The best multiplayer Civ experience ever developed means hundreds of hours of gameplay for you and leaders across the world.
• Customization: An unprecedented level of modding power allows you to customize the units, environments and gameplay to meet your vision, including a WorldBuilder editor, XML and Python scripting language editing.