Volume 2: "U7 - Berlin" is the next release continuing the successful product series " World of Subways" introducing famous subway lines around the world to all subway enthusiasts. After Vol. 1, Vol. 2 contains the route U7 of Berlin`s subway.
Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
Enter your unique code that's displayed on the 'Orders' page of CDKeys.com and follow the prompts to activate.
Your game is now viewable in the “Library” tab and is available to download/install when you’re ready. You can find additional support for the Steam client here: https://help.steampowered.com/en/wizard/HelpWithSteam