At the moment, American Truck Simulator is available for purchase from Steam at a cost of $20.00. This is a pretty decent price given what you're getting in return. Although, ATS also has a plethora of DLCs alongside the base and main game. Most of these DLCs add new vehicles and machinery into the game. Beyond that, ATS also has DLCs where they'd make certain parts of the US available to players - which didn't have as much exposure as in the base game. These DLCs would also unlock new livery options, paint options, interior upgrades, and more. To get the most out of including these American Truck Simulator DLCs, you can try buying purchasing a bundle on Steam. These bundles are generally cheaper than buying each DLC one by one and include quite a bit more content.