When you install the game, it generates a unique "Product Code" based on your computer’s hardware components.

If you are looking to get your simulator up and running, here is everything you need to know about how the serial number system works and how to resolve common activation issues. How Activation Works in City Car Driving

Many sites claiming to offer "Top Serial Numbers" or "Key Generators" are fronts for malware or adware that can compromise your PC.

Keys for version 1.4 or older will not work for the 1.5 Home Edition.

This is the key you receive upon purchasing the game.