Cartboard Games released ´Calm Down, Stalin´ on their page on the ´Steam´ platform back in the fall of 2016.
Sometimes a Steam Digital Code requires an US IP-Address in order to be activated on Steam. Read the store’s description if it’s only required for activation or if you also need an US IP-Address in order to play Calm Down Stalin CD key. If you don’t know how to do this, most stores offer help or a tutorial.