Here is the full list of all 21 Autobahn Police Simulator 2 achievements.
Drive at least for 10 seconds 200 kph or more
Unlock all Fast Travel Stations in the world
Enjoy a donut in all 5 donut shops
Discover all 10 memorials in the world
Find all 20 rubber duckies
Unlock and finish Konrad's mission
Buy all upgrades in STATION
Buy all upgrades in GARAGE
Buy all upgrades in TRAINING
Buy all upgrades
Find and arrest the stone thrower
Interrupt the big drug deal and catch the dealers
Arrest the mastermind behind the smuggler ring
Finish the campaign
Gain 50,000 Influence Points
Finish a traffic control 100% completely
Finish an accident 100% completely
Complete 5 car chases successfully
Show mercy with the truck driver and let him go
Arrest the truck driver
Join the autobahn police