The number of cheats AI uses in the original game was reduced. The AI was improved, and a new ‘extreme’ difficulty level was added. It includes all previous expansions from the original game (The WarChiefs, The Asian Dynasties). It features two new civilizations: Inca and Swedes with two new game modes: The Art of War and Historical Battles.
The remaster includes new 4K Ultra HD graphics, rebuilt 3D assets, improved destruction animations on buildings, a spectator mode, an overhauled and scalable UI, mod support, new server-based online multiplayer with cross-network play, new maps, and remastered sounds and music. The core gameplay elements are shared heavily with the original but Definitive Edition builds upon it. It includes all previous expansions from the original game. It features significantly improved visuals, a remastered soundtrack, two new game modes, and two new civilizations. It is a remaster of the original game Age of Empires III, celebrating the 15th anniversary of the original. Age of Empires III: Definitive Edition is a real-time strategy video game developed by Tantalus Media and Forgotten Empires and published by Xbox Game Studios.