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Empire Earth: The Art of Conquest
box cover art
Empire Earth: The Art of Conquest, or AoC, is an expansion upon the original Empire Earth developed by Mad-Doc Software and published by Sierra Entertainment.
New features included various new units in each epoch, 3 new campaigns, special powers in civilizations, and a whole new 15th epoch - the Space Age.
In AoC, the new special powers in civilizations definitely have an effect on traditional multiplayer settings (in comparison with the original Empire Earth).