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