"Long ago a computer scientist called Dr Sepulveda created a beautiful digital world existing entirely within a computer network of his own invention. This world was called Darwinia and it was inhabited by a peaceful, law-abiding digital life-form called the Darwinians.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.