American Truck Simulator is truck simulation game, developed by popular simulator game developer - SCS Software. Have you guessed it ? Of course you have! But let's start with a little teaser. Peterbilt, Mack, International, Kenworth and more used parts! visit our website for an easy search of our inventory. Supported game versions: ATS – (1. x DX11 International 9400i Peterbilt 387 Fixed 1. – This skin is made for the SCS Peterbilt 579 – Does not replace other skins Peterbilt 579 skin by 31MayGroup for ATS-1 See more.