If the game is already installed on an old PC but you need the key to reinstall on a new one:
How do I get the CD key when I buy the game off steam? : r/aoe3 product key age of empires 3
For over two decades, Age of Empires III has stood as a landmark in the real-time strategy genre. From the musket volleys of the British Redcoats to the horse-drawn cannons of the Russians, the game took players from the discovery of the New World to the Industrial Revolution. However, for millions of players, the gateway to this epic experience has always been a single, frustratingly fragile string of 25 alphanumeric characters: . If the game is already installed on an
If you have the original discs but have lost the key, you have a few legitimate options. However, for millions of players, the gateway to
If you registered the game with Microsoft or Ensemble Studios when you first bought it, you might have an email receipt containing the key. Search your archived emails for terms like "Ensemble," "Microsoft Games," or "Age of Empires."
After Microsoft closed the Ensemble Studios, the rights shifted. Services like entered the picture, which was a nightmare for key management. Many keys from the "Gold Edition" (Base + WarChiefs) came with a second key for GFWL that was required for multiplayer.
If the game is already installed, you can find the (different from the installation key) by going to Help and Tools > About from the main menu.