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