Age of Empires
"Age of Empires", released on October 26, 1997, was the first game in the series, as well as the first major release from Ensemble Studios. It was one of the first history-based real-time strategy games made, utilizing the Genie game engine. GameSpot described it as a mix of "Civilization" and "". The game gives players a choice of 12 civilizations to develop from the Stone Age to the Iron Age. The expansion pack, "The Rise of Rome", published by Microsoft on October 31, 1998, introduced new features and four new civilizations, including the Romans. Although the two games had contained many software bugs, patches resolved many of the problems.
Age of Empires
Ensemble Studios worked together with Big Huge Games to develop "The Asian Dynasties", "Age of Empires III"s second expansion. This was the first joint venture for both teams. The reason for them doing so was compatible schedules: Ensemble Studios was busy with other projects—particularly "Halo Wars"—while Big Huge Games' real-time strategy team had few projects at that time. Big Huge Games did most of the work, but Ensemble Studios designers Greg Street and Sandy Petersen joined in the brainstorming, and had control over the final product. Both studios had roles in testing the game before its release.