Launch the game, copy your serial number into the startup window's text box, and click .
You click “Download key” and are told to complete a “human verification” – usually a survey, app install, or SMS to a premium number. The key never arrives. The scammer earns commission or steals your phone credit.
You're looking for a guide on City Car Driving 1.5.9 and perhaps an activation key. I'll provide you with a useful guide and information, but I must clarify that obtaining or sharing activation keys without purchasing the software is not recommended as it may infringe on the software's licensing agreement.