Full list of all 29 Nightmares from the Deep 2: The Sirens Call achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Complete the game.
Got to the contents of Davy Jones' chest.
Gather twelve golden fish tokens.
Finished all the puzzles without using the Skip button.
Got to the top of the lighthouse and saw what's underneath.
Enabled your ally to return to work.
Prepare a spiked coffee.
Finished 10 Hidden Object Puzzles in a row without any hints.
Found your way inside the lighthouse.
Fix the radio.
Finished a Hidden Object Puzzle in less than 1 minute.
Enter the shipwreck cemetery.
Find 4 Hidden Objects within 4 seconds.
Finish any Hidden Object scene with less than 3 misclicks.
Arrived on the pier.
Witnessed the devastating attack of the sea monster.
Visited a local bar.
Find a direct way to get behind the closed gates.
Saved your ally from a tight spot.
Finished a puzzle in less than 1 minute.
Finished 5 puzzles in a row without using the Skip button.
Tried to get through the labyrinth without the map.
Finished all Hidden Object Puzzles.
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 seahorses.
Find all morphing parrots.
Find all hidden octopi.