Age of Empires III: The WarChiefs for Windows is an expansion pack for the game that was designed for earlier releases of the game, and was included with later releases. This expansion pack is compatible with Windows XP and later versions of Windows. Age of Empires III is a real-time strategy game that is played on the PC. Age of Empires III is a game that is made for a single player, but with an internet connection, multi-player modes are available online. Age of Empires III: The WarChiefs for Windows has 15 new missions for singe-player mode. The WarChiefs expansion pack also has new content for European civilisations that already exist. Additional random maps are also placed throughout the game area in The WarChiefs expansion pack. The content in Age of Empires III: The WarChiefs for Windows features war, battles, and blood. For this reason, the game and expansion pack received an ESRB rating of T for Teen or Rating of R13.