The biggest question with a portable "repack" is stability. Surprisingly, the v1.39 build runs exceptionally well on mid-range hardware.
If you're interested in learning more about Euro Truck Simulator 2, its DLCs, or how to download them safely, I can provide more general information or point you in the right direction. euro truck simulator 2 139 all dlc download portable
In late 2020, SCS Software released update 1.39 for ETS2. This was a landmark update. It introduced: The biggest question with a portable "repack" is stability
While there are various unofficial "portable" or "repack" versions of Euro Truck Simulator 2 (ETS2) version 1.39 or how to download them safely