Here is the full list of all 27 Agatha Christie - there are Murder on the Orient Express achievements.
Make the pigeons fly away in Venice.
Finish chapter 8.
Confront the twelve jurors without making mistakes.
Finish chapter 7.
Finish chapter 6.
Convince Count Andrenyi at the first attempt.
Dodge Arbuthnot's punch.
Finish chapter 5.
Finish chapter 4.
Finish chapter 3.
Finish chapter 2.
Finish chapter 1.
Find the right ingredients by looking at Freja's dessert.
Finish chapter 0.
Finish chapter 9.
Finish chapter 10.
Finish chapter 11.
Finish chapter 12.
Finish chapter 13.
Complete a new game without using a single hint.
Collect all the golden moustaches.
Solve the chess workshop.
In a new game, do all the confrontations without ever making a mistake.
Finish the chase without losing sight of the killer.
Confront the real killer without making mistakes.
Complete the Characters menu.
Find the code to Joanna's briefcase without asking Bouc to keep quiet.