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