The Washington Add-on for American Truck Simulator has 8 achievements.
Visit Mount St. Helens, Grand Coulee Dam, Mount Rainier (requires Washington DLC)
Discover every city in Washington (requires Washington DLC)
Deliver a cargo to an aerospace company in Washington (requires Washington DLC)
Deliver a cargo to both port terminals in Washington (requires Washington DLC)
Drive through the forest road to timber harvest in Bellingham (requires Washington DLC)
Deliver a boat to a marina in Washington (requires Washington DLC)
Drive through both Seattle tunnels (requires Washington DLC)
Use a ferry to cross the water (requires Washington DLC)