The Heavy Cargo Pack Add-on for American Truck Simulator has 5 achievements.
Deliver first Heavy Cargo Pack job (requires Heavy Cargo Pack DLC)
Use truck scale or weigh station with gross vehicle weight of at least 175,000 lbs (requires Heavy Cargo Pack DLC)
Complete a perfect delivery (no damage, no fine, in-time) of a cargo from the Heavy Cargo Pack which is at least 1,000 miles long (requires Heavy Cargo Pack DLC)
Earn $100,000 on 5 consecutive Heavy Cargo Pack deliveries (requires Heavy Cargo Pack DLC)
Complete a delivery of all heavy cargoes in American Truck Simulator (requires Heavy Cargo Pack DLC)