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