Age of Empires II: The Conquerors is the first expansion pack to the 1999 real-time strategy video game Age of Empires II: The Age of Kings. The fourth installment in the Age of Empires series by Microsoft Game Studios and Ensemble Studios, The Conquerors was released in August 2000. It features five new civilizations (the Aztecs, Mayans, Spanish, Koreans, and Huns), four new campaigns, eleven new units, twenty-six new technologies, new gameplay modes, new maps and different minor tweaks to the gameplay.
