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 all games of Mahjong.
Find all fifteen Phantom Objects hidden across the game.
Finish the game without using a Hint.
Finish all Hidden Object Puzzles without using a Hint.
Find all nine Hidden Clue Symbols.
Finish five Hidden Object Puzzles in under two minutes each.
Complete the Asylum Model.
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.
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.
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.
Find three Phantom Objects.
Find three Hidden Clue Symbols.
Visit the closed ward.
Finish three Hidden Object Puzzles without using a Hint.
Finish one Hidden Object Puzzle 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.
Finish a game of Mahjong.
View three cut scenes without using Skip.
Solve your first Detective Mode scene.
Solve a Puzzle without using Skip.