Here is the full list of all 19 PataNoir achievements.
Completed the tutorial
Killed Allan Jameson
Went out in a blaze of glory
Let Lisa go
Reached all the endings
Lisa escaped punishment
Got lost in the curves of a beautiful woman
Told The Baron about Lisa
Solved the case
Lisa was arrested
Drove up the mountain road
Arrived at the vacation house
Arrived at the casino
Entered the apartment
Talked to the pirate
Entered the gardens
Arrived at The Baron's mansion
Started a new game
Watched the music video