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.
Complete the Asylum Model.
Find all fifteen Phantom Objects hidden across the game.
Finish half of all the games of Mahjong.
Finish three games of Mahjong without using Shuffle.
Find all nine Hidden Clue Symbols.
Finish a game of Mahjong.
Finish the game without using a Hint.
Finish all Hidden Object Puzzles without using a Hint.
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.
Find three fragments of the Asylum Model.
Learn about Kreuz's secret.
Find three Hidden Clue Symbols.
Make your way out.
Gather five Clues in your Journal.
Finish Zed's masterpiece.
Finish five Hidden Object Puzzles in under two minutes each.
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.
Find three Phantom Objects.
Disarm all booby traps.
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.