Age of Empires II: The Conquerors Expansion is the official add-on to the award-winning, best-selling real-time strategy game Age of Empires II: The Age of Kings. Focusing on legendary leaders, The Conquerors will challenge veterans and novices to wage war on an epic scale with all-new civilizations, unique units and technologies, and campaigns based on infamous conquerors such as Attila the Hun, El Cid and Montezuma. Age of Empires II: The Conquerors is the first expansion pack to the 1999 real-time strategy game Age of Empires II: The Age of Kings. The Conquerors is the fourth installment in the Age of Empires series by Microsoft Game Studios and Ensemble Studios. 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. A Sega Dreamcast version for both the original game and the expansion were announced, but were cancelled for unknown reasons.

Age of Empires II é um jogo de estratégia em tempo real que se concentra na construção de cidades, na coleta de recursos e na criação de exércitos para derrotar os oponentes. Players conquer rival towns and empires as they advance one of 13 civilizations through four "Ages": the Dark Age, the Feudal Age, the Castle Age (being the High Middle Ages), and the Imperial Age, reminiscent of the Renaissance—a 1000-year timeframe. Avançar para uma nova Era desbloqueia novas unidades, estruturas e tecnologias, mas os jogadores devem primeiro construir certos edifícios de sua idade atual e depois pagar uma soma de recursos (normalmente comida e ouro).