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