Here is the full list of all 28 The Myth Seekers 2: The Sunken City achievements.
You managed to stop the fire from spreading.
You successfully found the hidden symbols.
You successfully deciphered the secret message of Fabien.
You managed to free the Caretaker from the vines.
You managed to reveal the Caretaker's secret niche.
You successfully navigated the cemetery alleys.
You restored the statuette's headdress.
You learned the story of the Dark Forest.
You located the Dark Forest.
You revealed your way to Ys.
You reached your destination.
You saved the Mermaid's fishes.
Your sense of balance stood the test.
You summoned the Ghost of Gradlon.
You created a beautiful cake.
You befriended the dog.
You managed to hit your target.
You retrieved the ship from the bottom of the sea.
Finish all Minigames without skipping.
Complete two Minigames without skipping.
Complete five Minigames without skipping.
Complete a Minigame in less than a minute.
Find all Collectibles.
Finish a Hidden Object Puzzle in less than a minute.
Finish all Hidden Object Puzzles without any Hints.
Finish a Hidden Object Puzzle without any mistakes.
Finish three Hidden Object Puzzles without any Hints.
Finish Hidden Object Puzzles in 45 seconds without Hints.