"Age of Empires II + The Conquerors" (1999) is a real-time strategy video game developed by Ensemble Studios and published by Microsoft. It is a spin-off of the Age of Empires series and was released as an expansion pack for the original Age of Empires II: The Age of Kings in 1999. The game allows players to play as one of 13 civilizations, including the Chinese, Spanish, Germans, Mongols, Russians, and Aztecs. Players can build up their civilizations through exploration, trade, and warfare.

The expansion pack added new features to the original game such as new civilisations, campaigns, maps and technologies. The most significant addition was the five so-called "Conqueror" civilizations—the Aztecs, Huns, Koreans, Mayans, and Spanish—each of which had unique units, technologies, and abilities. Additionally, each civilization had its own set of campaigns with unique objectives. For example, the Spanish had to spread their religion to a certain number of villages before they could win. Other additions included two new types of resources—spices and gold—and a new technology tree for the new civilizations.

Age of Empires II + The Conquerors also introduced several new game modes, including a deathmatch mode in which players compete against each other. Additionally, it added several new game types, such as the King of the Hill, Wonder Race, and Regicide. The game also included a map editor so that players could create their own custom maps.

Age of Empires II + The Conquerors received generally positive reviews from critics, who praised its visuals and depth of gameplay. The game has sold over 4 million copies since its release, and it is considered one of the best real-time strategy games of all time. As of 2021, Age of Empires II + The Conquerors is still available for purchase on Steam, GOG, and the Microsoft Store, and it is also available for download as part of the Age of Empires II HD Edition. Fans of the series can also purchase the Age of Empires II: Definitive Edition, which includes all content from the original game and the expansion, as well as improved graphics and additional content.

For those looking for the original Age of Empires II: The Age of Kings, the game is still available for download from various sources, including GOG, the Microsoft Store, and Steam. Additionally, the Age of Empires II: The Age of Kings HD Edition is still available for purchase on Steam and GOG. The Age of Empires 2: The Conquerors expansion can also be purchased separately, or as part of the Age of Empires 2 HD Edition.

Overall, Age of Empires II + The Conquerors remains one of the most beloved real-time strategy games of all time and is sure to provide hours of fun for those looking for an old-school gaming experience. Whether you’re looking for the original Age of Empires II: The Age of Kings or the expansion pack, Age of Empires 2: The Conquerors, you can find them both online. With its depth of gameplay, fascinating storylines, and unique civilizations, Age of Empires II + The Conquerors is sure to provide hours of entertainment for gamers of all ages.