For (ETS1), the activation process typically depends on where the game was purchased. Unlike its successor, ETS1 is an older title and its official digital storefront presence has changed over time. How to Find Your Activation Details

To activate Euro Truck Simulator (ETS) , you generally need a unique product key provided at the time of purchase. Where to Find Your Activation Code

Look for emails dating back to the late 2000s or early 2010s containing keywords like "SCS Software," "Euro Truck Simulator," "Esellerate" (a common payment processor at the time), or "License Key."