If you have already purchased the game but are having trouble activating version 1.5.9, check the following:
You may encounter websites promising "free" keys or "key generators" for version 1.5.9. It is highly advised to for several reasons:
The internet is filled with "stories"—mostly misleading—about finding a working activation key for version 1.5.9: Key Generators and "Cracks" : Many forums and Reddit threads
Buying from the City Car Driving Steam Page is the recommended method. It simplifies the installation and activation process.
If you already own a standalone serial number, you can exchange it for a at the Steam Key Exchange portal .