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