Civilization IV: Gold Edition combines the original Civilization IV release with its expansion pack, Civilization IV: Warlords.
Civilization IV enables you to raise a human civilization from its first tribal stirrings as a stone-age people straight through the age of modern technology.
Civ IV features a detailed 3D environment, and sports new ways to win and play, new tools to use to manage and expand your civilization, new mod capabilities and multiplayer modes and options.
Civilization IV: Warlords takes the core game and expands upon it. It lets you recruit some of history's most famous (and feared) military leaders, and adds eight new scenarios to the game, adding a "Warlord unit for new gameplay.
New civilizations, leaders, units and "Wonders enhance the game further.