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Amazon.com has the Sid Meier's Civilization IV: Gold Edition (PC Game) for $19.99 with free shipping on orders $25 and over.
Final Price for this deal: $19.99 + Free Shipping on orders $25 and over

Description:
The ultimate strategy game, offering players the chance to lead their chosen nation from the dawn of man through the space age
Build the most powerful empire and become the greatest ruler the world has ever known
Civilization comes to life in a beautifully detailed, living 3D world--with all-new easy-to-use mod capabilities and intense multiplayer modes and options
Includes both Civilization IV and the combat-focused Warlords Expansion Pack
Gold Edition bonus items include fantasy-style poster, behind-the-scenes DVD, tech-tree poster, and Civilization IV manual