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