“Us And Them - Cold War” is a turn-based strategy game about cold war that you can play either as CIA or KGB. Although it is a game of territorial expansion, the rivals do not attack their opponent using military force. Instead they are using an army of Spies, Assassins and Experts of various kinds (like economy, technology etc.
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