Age of Empires
Age of Empires is a series of historical real-time strategy video games, originally developed by Ensemble Studios and published by Microsoft Studios. The first title of the series was "Age of Empires", released in 1997. Seven titles and three spin-offs have been released.
Empire Earth (series)
Empire Earth is a series of real-time strategy video games developed by Stainless Steel Studios and Mad Doc Software, and published by Sierra Entertainment, Activision, and Vivendi. The games in the series are historical RTS games that are similar to "Age of Empires". Rick Goodman, who designed "Empire Earth" and "Empires: Dawn of the Modern World", was one of the lead designers of "Age of Empires". The games use the Titan and Titan 2.0 engine, which was sold after SSSI closed.