Here is the full list of all 62 MudRunner achievements.
Finish a level without changing any vehicle addons in Single Player mode
Load up a truck and drive to an Lumber Mill without releasing accelerator
Load up two trucks and winch them together to reach Lumber Mill simultaneously
Finish a level without reaching any Watchpoints in Single Player mode
Finish a level without using the Navigation map in Single Player mode
Finish a level using only one vehicle in Single Player mode
Complete "The Bog" in Hardcore mode
Complete all bonus objectives in the challenge "Freight-Ex"
Complete all bonus objectives in the challenge "Crane Operator II"
Complete all bonus objective in challenge "The Expedition"
Complete all bonus objectives in the challenge "Cross a River"
Complete all bonus objectives in the challenge "Visit Grandma"
Complete all bonus objectives in the challenge "Delivery Mission"
Complete all bonus objectives in the challenge "Crane Operator"
Complete all bonus objectives in the challenge "Night Safari"
Complete the "Island" in Hardcore mode
Fill a particular Lumber Mill by delivering Long Logs only
Fill a particular Lumber Mill by using Type B-130 only
Fill a particular Lumber Mill by delivering Short Logs only
Reach all Watchpoints on any level with the Type A-3151 vehicle
Squelch 50 mushrooms in total
Complete the "Downhill" in Hardcore mode
Find and visit 2 fluorescent flower meadows in the "Downhill" at night in one game
Reach all Watchpoints in the "Downhill"
Complete the "Crossing" in Hardcore mode
Travel 100 kilometers
Reach all Watchpoints in the "Crossing"
Reach all Watchpoints in the "Island"
Squelch 50 pumpkins in total
Unlock all Garages in the "Crossing"
More than 150 meters away from any Garage, tow a fully damaged truck to a Garage
Winch a disabled vehicle out of the water with another vehicle
Repair other player trucks for 1000 points in total
If capsized while delivering load, pick and pack scattered logs back
Complete all bonus objectives in the challenge "Climb a hill"
Complete all bonus objectives in the challenge "Repair & Refuel"
Complete all bonus objectives in the challenge "The Rig"
Travel 10 kilometers along the shorelines of American Wilds
Reach speed of 40 km/h with a loaded truck
Drive with the parking brake engaged for 200 meters in total
Use winch in Pull mode to tow another vehicle for 50 meters in total
Reach the top of any 2 of 3 mountains in the "Island" in one game
Pass 5 log ownerships to other players
Complete the "Seashore" in Hardcore mode
Deliver the load without receiving any damage and switching to other trucks
Fill up other player's trucks with 1000 litres of fuel in total
Reach all Watchpoints in the "Seashore"
Unlock all Garages in the "Seashore"
Make a quick 360 degree roll over the roof
Knock down 100 trees it total
Receive 500 or more damage points from a single impact
Complete the "Deluge" in Hardcore mode
Burn 100 litres of fuel without releasing accelerator
Reach all Watchpoints in the "Deluge"
Unlock all Garages in the "Deluge"
Drive through water so that your vehicle is submerged and then escape without the engine stalling
Unlock all Garages in the "Island"
Reach all Watchpoints in "The Bog"
Unlock all Garages in "The Bog"
Load up Type A vehicle in the trunk of your truck and drive it for 200 meters in total
Unlock all Garages in the "Downhill"
Get in Type A-968m and drive 400 meters or more away