Empire Earth is a real-time strategy video game developed by Stainless Steel Studios and released on November 23, 2001. It is the first game in the Empire Earth series.
The game requires players to collect resources to construct buildings, produce citizens, and conquer opposing civilizations. Empire Earth spans 500,000 years of world history, which is divided into 14 epochs, beginning with the prehistoric age, and ending with the nano age.
Its expansion pack was developed by Mad Doc Software which was released on September 17, 2002, which had new features like special powers for each civilization. It also had a new 15th era entitled as “Space Age” which is focused on the colonization of space planets.
Empire Earth gameplay is very similar to the Age of Empires series; it is alos a history based RTS game. It uses 3D graphics related to Age of Empires III does unlike spirits on Age of Empires II.
However, this game has been discontinued, but you can still buy its Gold Edition at https://www.gog.com/game/empire_earth_gold_edition