Here is the full list of all 15 The Last Express Gold Edition achievements.
Find a quiet place for Tyler to rest
Find a souvenir of Tatiana's happier days
Arrive in Constantinople
If you like her, don't be shy
Find someone's stash of racy postcards
Read August's secret correspondence
"Borrow" Kronos's briefcase
Read Kronos's private papers
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
Experience all the "losing" endings of the game
Get off with the gold in Vienna