While was a transformative milestone for the sim, downloading it as a standalone ".zip" from unofficial sites is often a shortcut to security risks rather than a nostalgia trip.

If you are looking to download American Truck Simulator (ATS)

To prepare for installing American Truck Simulator V1.31.1s , follow these steps. Please note that version 1.31.1s is an older legacy build of the game; the current stable version is as of early 2026. Truck Simulator Wiki 1. Check System Requirements

If you own ATS on Steam, you do not need a shady .zip file. Steam allows you to downgrade to any previous version. Here is how to “download” the equivalent of American Truck Simulator V1.31.1s.zip legally:

: Dashboard computers now display trip data with increased precision for better fuel and distance tracking.

This specific version is highly sought after by players who prefer specialized legacy mods or those running older hardware. Here are the core upgrades included in this build: