Empire Earth is described as 'Also known as EE, 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: Empire Earth, Empire Earth II, Empire Earth III' and is a RTS game in the games category. There are more than 25 games similar to Empire Earth for a variety of platforms, including Windows, Linux, Mac, Steam and Android apps. The best Empire Earth alternative is 0 A.D., which is both free and Open Source. Other Empire Earth like games are Age of Empires, FreeCiv, Warcraft III and Warzone 2100.
Empires (especially the "Empires: Dawn of the Modern World" adaptation) is EXACTLY like EE, except the game is limited in its epochs, ranging from about 900AD to 1945AD. Same stuff otherwise.