Here is the full list of all 39 9 Clues 2: The Ward achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Finish the game without using a Hint.
Finish all Hidden Object Puzzles without using a Hint.
Finish three Hidden Object Puzzles without using a Hint.
Finish five Hidden Object Puzzles in under two minutes each.
Find all nine Hidden Clue Symbols.
Complete the Asylum Model.
Find all fifteen Phantom Objects hidden across the game.
Finish one Hidden Object Puzzle without using a Hint.
Finish all games of Mahjong.
Be a hero and save lives.
Gather full information about all the characters.
Solve all Puzzles without using Skip.
Gather all nine Clues in your Journal.
Watch all the cutscenes in the game without using Skip.
Create your puppet.
Find a way to call for help.
Solve all Detective Mode scenes.
Learn about Kreuz's secret.
Find three Hidden Clue Symbols.
Make your way out.
Gather five Clues in your Journal.
Find three fragments of the Asylum Model.
Finish Zed's masterpiece.
Solve five Puzzles in under two minutes each.
Finish half of all the games of Mahjong.
Visit the closed ward.
Finish three games of Mahjong without using Shuffle.
Fix the sprinklers.
Gather three Clues in your Journal.
Regain a clear mind.
Fight your fears.
Find a way out.
Solve three Puzzles without using Skip.
Disarm all booby traps.
Find three Phantom Objects.
Finish a game of Mahjong.
View three cut scenes without using Skip.
Solve your first Detective Mode scene.
Solve a Puzzle without using Skip.