Here is the full list of all 38 OVERPASS™ achievements.
Finish a race and sustain less than 10% damage
Finish an obstacle course without any penalties
Win your first Gold medal on a track
Install a vehicle upgrade
Collect all other achievements
Qualify for the World Finals
Win the World Finals
Win your first Challenge
Win 3 challenges in a row in Career mode
Earn your first reputation title
Earn the highest reputation title
Unlock everything in Career mode
Own everything in Career mode
Win a duel
Repair your vehicles for a total cost of $20000
Spend time repairing a vehicle yourself
Win your first obstacle course in Career mode
Win your first hillclimb in Career mode
Play a race in each venue
Win a Gold medal on all tracks in Northern Forest
Win a Gold medal on all tracks in Open Arena
Win a Gold medal on all tracks in Adriatic Coast
Win a Gold medal on all tracks in Old Canyon
Win a Gold medal on all tracks in Jungle Ridge
Win a Gold medal on all tracks in The Pit
Win a Gold medal on all tracks
Finish a split screen race
Finish a hot seat race
Finish an online race
Buy your first vehicle in Career mode
Unlock all vehicles in Career mode
Own all vehicles in Career mode
Change the livery of a vehicle in Career mode
Own all liveries in Career mode
Install an upgrade of each type for a vehicle
Install an upgrade of each type for all vehicles
Unlock all rider gear in Career mode
Own all rider gear in Career mode