Because American Truck Simulator frequently updates (with the latest being as of early 2026), players specifically seeking version 1.39 often need to use Steam's versioning tools to "downgrade" or maintain that specific build for mod compatibility.
The 1.39 version brought several major changes to the simulation experience: american truck simulator 139 download new
: Right-click the game title and select Properties . Select Betas : Go to the Betas tab in the properties menu. american truck simulator 139 download new