Here is the full list of all 24 Wheels of Aurelia achievements.
Unlock all cars
Unlock Ending B
Unlock all endings
Unlock Ending O
Unlock Ending N
Unlock Ending P
Unlock Ending H
Unlock Ending J
Unlock Ending M
Unlock 10 endings
Unlock Ending G
Unlock Ending E
Unlock Ending F
Unlock Ending C
Unlock Ending K
Pick up all hitchhickers
Let it go!
Play indifferent
Unlock Ending L
Unlock Ending D
Unlock Ending I
Complete the game for the first time
Unlock Ending A
Finish the game in under 15 minutes