text: A second expansion, The Forgotten, was released on Steam in November 2013, more than a decade after the release of The Conquerors. In November 2015, another expansion was released, also on Steam, entitled The African Kingdoms. A third Steam expansion, entitled Rise of the Rajas, was released in December 2016. In November 2019, Age of Empires II: Definitive Edition launched with all previous expansions included, as well as a new expansion titled "The Last Khans". In January 2021, Age of Empires II: Definitive Edition released yet another expansion, "Lords of the West", adding the Sicilians and Burgundians.
  Gameplay
  The Conquerors introduced various new gameplay features and tweaks, including the new game modes Defend the Wonder, King of the Hill and Wonder Race. Additional maps, some based on real-life geographic locations, and new winter and tropical terrain textures were also included.
  In-game, infantry are now able to garrison in battering rams, protecting the infantry while increasing the ram's speed and attack, while ships are now able to use formations for more effective fighting. The graphics are left unchanged, but five new civilizations have been added: the Spanish, Huns, Koreans, Mayans and Aztecs. In addition to new units, the in-game upgrade lines have been extended to provide more unit choices.
  The Aztecs and Mayans lack the ability to train cavalry units, which is partially balanced by the fact that they start with Eagle Warrior infantry units, who have many of the advantages that cavalry have. Both civilizations also lack access to gunpowder units. The Huns are also unique in that they do not build houses to support their population, from the start being only limited by the fixed population limit of the game.