Redeem the key in the Steam client ("Games" -> "Activate a Product on Steam").
This is a legitimate process for those without an internet connection, not a "crack." If your gaming PC is offline, you can use the official offline activation process. After launching the game and entering your key, locate the activation.scb file in your Documents -> Euro Truck Simulator 2 folder. Copy this file to a USB drive, take it to an internet-connected computer, and upload it on the official Euro Truck Simulator 2 activation page. The website will then guide you through generating an unlock code to use on your offline PC. euro truck simulator 2 14048 activation key hot
If you want to test how the game runs on your system before spending any money, Steam offers a comprehensive free demo of Euro Truck Simulator 2. Your progress from the demo will even carry over if you choose to buy the full version later. Redeem the key in the Steam client ("Games"