Here is the full list of all 17 The Great Gatsby: Secret Treasure achievements.
Complete The Great Gatsby without using hints or skips
Find Great Gatsby’s Treasure
Player completes the casket puzzle
Complete all minigames without skip
Complete all HO without hint
Find all the codes from the paintings
Complete all the watch mini-games
Successfully develop all the negatives
Discover a grim truth about the watchmen
Enter the library for the first time
First watch mini-game completed
Complete 3 minigame without skip
Finish any minigame in under 1 minute
Complete the labyrinth mini-game
Complete 3 Hidden Object scenes without hint
Finishing any HO in under 3 minutes
Find out all you can on your first trip to Gatsby's mansion