Commandos 3: Destination Berlin EU Steam CD Key

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.