You're looking for information on American Truck Simulator!
and is significantly older than the current official version, , released in early 2026. Truck Simulator Wiki Safety and Legitimacy Review Malware Risks
As of April 2026, the game has advanced far beyond a "1.31" version. The latest major updates include: Key Features in Recent Updates (v1.51 - v1.59) American Truck Simulator 1.51 Update Release
Download the Free Demo: You can download a free, fully functional demo of American Truck Simulator directly from its Steam Store Page. This version allows you to experience the core gameplay mechanics, though it has limited map areas compared to the full game.
Is Downloading ATS 1.3.1 for Free Legal?
This is the most important question. American Truck Simulator is a commercial product created by SCS Software. Downloading a cracked or pirated copy of version 1.3.1 for free is technically illegal and violates copyright law.
Official Paid Version: You can buy the full game on Steam, where it typically retails for around $19.99 (or local equivalents like ₹920).