Here is the full list of all 15 The Last Express Gold Edition achievements.
Arrive in Constantinople
If you like her, don't be shy
Get off with the gold in Vienna
Read Kronos's private papers
"Borrow" Kronos's briefcase
Read August's secret correspondence
Find a souvenir of Tatiana's happier days
Catch a beetle in the smoking car
Read a young lady's intimate journal
You can't stay awake forever
Meet Milos in your compartment
Tyler's ready to leave the train
Find a quiet place for Tyler to rest
Find someone's stash of racy postcards
Experience all the "losing" endings of the game