Here is the full list of all 31 Nightmares from the Deep 2: The Siren's Call trophies - there are 14 bronze, 10 silver, 6 gold and 1 platinum.
Get to the contents of Davy Jones' chest.
Gather twelve golden fish tokens.
Finish all the puzzles without skipping.
Finish all Hidden-Object Scenes.
Get to the top of the lighthouse and see what's underneath.
Enable your ally to return to work.
Prepare a spiked coffee.
Find your way inside the lighthouse.
Finish 10 Hidden-Object Scenes in a row without using any hints.
Fix the radio.
Enter the shipwreck cemetery.
Finish any Hidden Object scene with less than 3 mistakes.
Save your ally from a tight spot.
Finish a Hidden-Object Scene in less than 1 minute.
Find a direct way to get behind the closed gates.
Find 4 Hidden Objects within 4 seconds.
Finish 5 puzzles in a row without skipping.
Visit local bar.
Finish a puzzle in less than 1 minute.
Witness the devastating attack of the sea monster.
Arrive on the pier.
Unlock every Trophy.
Finish a game of Mahjong in less than 1 minute.
Finish half of all the games of Mahjong.
Finish all the games of Mahjong.
Find all secret sea horses.
Find all morphing parrots.
Find all hidden octopi.
Complete the game.
Complete the game on expert difficulty.
Complete the bonus adventure.