Full list of all 19 9 Clues: The Secret of Serpent Creek achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Save yourself.
Complete your first Detective Mode.
Solve a Puzzle without using the Skip button.
Solve five Puzzles without using the Skip button.
Solve all Puzzles without using the Skip button.
Solve three Lockpick puzzles in less than one minute.
Complete all the Detective Mode scenes.
Play with Breebo.
Complete three Hidden-Object Puzzles without using the Hint button.
Watch the cutscene in the museum.
Find three Clues connected to your investigation.
Find five Clues connected to your investigation.
Find all Clues connected to your investigation.
Read three newspapers.
Gather information on all of the characters.
Find all nine
Finish your first Hidden-Object Puzzle.
Get rid of Breebo for good.
Complete all other achievements.