While you may see "free" downloads advertised for v1.31 with "all DLC," it is important to note that developed by SCS Software.

For a step-by-step guide on how to safely access the free demo version on your PC:

Euro Truck Simulator 2 v1.31 with all DLCs and updates is a comprehensive and engaging simulation game that offers a realistic trucking experience. While free versions are available online, make sure to exercise caution when downloading and installing the game to ensure a safe and stable gaming experience.

: Dynamic accidents and road closures to make driving more realistic. Trailer Cables

When a website promises "euro truck simulator 2 v 131 with all dlc and updates free better," they are usually offering a repack of the 2018 version, bundled with every map DLC released up to that point.