The New Mexico Add-on for American Truck Simulator has 5 achievements.
Visit all large truck stops and rest stops in New Mexico (requires New Mexico DLC)
Discover every city in New Mexico (requires New Mexico DLC)
Discover shortcut through the forest (requires New Mexico DLC)
Deliver cargo to An-124 depot (requires New Mexico DLC)
Drive by the Billy The Kid Museum (requires New Mexico DLC)