Steam now offers a playable demo for American Truck Simulator, allowing the chance to get behind the wheel of a big rig in SCS Software's transport sim sequel. Here's word on what this includes:

If you are still unsure whether to take the risk and buy the game for fear of technical incompatibility, we are happy to announce the availability of a free American Truck Simulator demo. Try it out to make sure the game will work on your computer before making the purchase decision. You can grab it from Steam now, just as the game itself.

The demo is limited by the number of jobs taken and only contains the state of California, but technically it's identical with the game itself. If you purchase the game after playing the demo, you can continue driving where you have left off, as the save game stored in the demo mode is compatible with the full game.