Home City shipments have been slightly reworked. Sometimes the copper mines can produce 2000 coin, the same as silver, whereas gold mines produce 5000 coin. On some maps, copper and tin mines have been added, but these generally do not produce as much coin as the gold and silver mines. Instead, there are a number of new concepts introduced, whilst existing concepts have been expanded. There are no major changes to the mechanics to Age of Empires III - players are still expected to gather resources, build armies and send them to attack opponents.
It was followed by a second expansion pack to the original game called Age of Empires III: The Asian Dynasties. The full game for Mac was released on Jin the United States. The Mac version was ported over, developed and published by Destineer's MacSoft Games. The expansion pack was then bundled with the full game of Age of Empires III, being called Age of Empires III Gold Edition on September 19, 2006. The full game for PC was released on Octoin the United States. The demo version was released October 4, 2006. It was announced by Ensemble Studios and Microsoft Game Studios on March 7, 2006. Age of Empires III: The WarChiefs is the first official expansion pack for the real-time strategy game Age of Empires III.