: This update completely redesigned Lowboy trailers, making them ownable and including articulated variants. These trailers were updated with new visuals and the ability to carry a wider variety of heavy cargo.
: The main launch screen was rebuilt for better accessibility, placing the DLC Browser, Mod Manager, and Profile Manager together. It also introduced a new Game Options feature, allowing players to adjust settings before even loading into their truck.
: From the drop-down menu, select the branch labeled "temporary_1_39 - 1.39 for incompatible mods" or a similar legacy version. american truck simulator 139 download new
: Version 1.39 officially added the Freightliner Cascadia® to the game's fleet.
: SCS Software added a Turbo sound slider to give players more control over cabin noise levels. The update also improved spatial mixing for interior sounds and sound distribution to accessories. : This update completely redesigned Lowboy trailers, making
The 1.39 version brought several major changes to the simulation experience:
: Once selected, Steam will automatically begin downloading the 1.39 files. System Requirements and Mod Compatibility American Truck Simulator Version history It also introduced a new Game Options feature,
The , released by SCS Software on November 5, 2020, introduced significant structural and quality-of-life improvements that continue to serve as a foundation for the game's current mechanics. This update was notable for its complete overhaul of the game's initial interface and the introduction of advanced trailer ownership options. Key Features of the 1.39 Update
: Right-click the game title and select Properties . Select Betas : Go to the Betas tab in the properties menu.
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.