Gothic 3 is a fantasy-themed role-playing game for Windows from the German game developer Piranha Bytes. It is the sequel to Gothic II. Although widely available in English, the native release of the game is German. The game was released throughout the European Union on October 13, 2006 and became available throughout North America starting November 20, 2006. The North American release incorporates two patches that appeared after the initial UK edition. A Collector's Edition was also released containing bonus collectible material. JoWooD released a standalone expansion, entitled Gothic 3: Forsaken Gods, on November 21, 2008.Go to: http://store.steampowered.com/ and download STEAM client
Click “Install Steam” (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don’t have).
Please follow these instructions to activate a new retail purchase on Steam:
Launch Steam and log into your Steam account.
Click the Games Menu.
Choose Activate a Product on Steam…
Follow the onscreen instructions to complete the process.
After successful code verification go to the “MY GAMES” tab and start downloading.