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 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.
: Navigate to your Steam Library and find "American Truck Simulator.".
: 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.
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
