Full list of all 50 Hitchhiker (Windows) achievements worth 2,500 gamerscore. It takes around 2-3 hours to unlock all of the achievements in the base game.
The base game contains 19 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 31 achievements worth 1,500 Gamerscore.
Read the credits
Reach player level 20
Reach player level 15
Complete 50 missions
Get in 100 vehicles
Fail a mission when you are close to the end
Complete a mission with less than 5 seconds remaining
Use 10 overtakes
Use 50 u-turns
Complete 30 missions
Get in 3 vehicles in a single mission
Complete a mission while overtaking
Use 50 boosts
Complete 10 missions
Get knocked over by an Ambulance
Reach the destination in a Police car
Complete all tutorial missions
Complete a mission without getting out of a car
Complete the first mission
Complete 10 challenges
Complete an extreme challenge
Complete an extreme challenge with 30 seconds or more remaining
Use all of the power ups in a single mission
Complete your first challenge
Level up by completing a challenge
Access the city expansion
Complete a time trial
Earn a grade A rating by completing a time trial
Use a car, train and helicopter in the same mission
Access all points of interest
Access a point of interest
Get off a train at the same station you got on after completing a lap of the track
Ride on a train
Walk around the park
Ride in a helicopter
See what the ducks have to say
Be the first car in the queue at a train crossing
Access the old town expansion
Complete 5 missions at night
Complete a mission with Eve
Play the game at midnight
Complete a mission with "The Boss"
Complete a mission with Lola
Complete a mission with Carl
Ride in a helicopter during a thunder storm
Complete a mission with Mia
Complete a mission with Vincent
Complete 5 missions during the day
Use a boost during a thunder storm
Complete a mission in the rain