To download , the most reliable and legal method is using the Steam Beta system. Released in late 2020, version 1.39 is a popular "legacy" version often preferred by players for specific mod compatibility or for those who prefer the graphics before the major 1.40 lighting overhaul. How to Download ETS2 1.39 via Steam
If you haven't already, install Euro Truck Simulator 2 via your Steam Library. Let it install the current latest version (usually 1.48 or 1.49). That is fine. download ets2 1.39
If you want a stable, feature-rich experience without the occasional bugs of newer versions (1.40+ introduced a complex lighting overhaul that broke many graphics mods), 1.39 is your target. To download , the most reliable and legal