No missable achievements (plus 36 unknown)
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Find an Illusive Object.
Find a mysterious helping hand.
Perform your first Evidence Deduction.
Find an Ethereal Butterfly.
Find the way back to the surface.
Activate the cable car.
Establish the suspect of your investigation.
Find the way back to the park grounds.
Build a stable river crossing.
Finish any Mini-Game in less than 1 minute.
Treat your ally's wounds.
Gain access to the inner manor grounds.
Help recover a long-lost mind.
Free yourself from captivity.
Find 15 Illusive Objects.
Collect all the Evidence.
Complete the relief and open the cell.
Perform all Evidence Deductions.
Deal with the beast. Permanently.
Complete the game.
Find 15 Ethereal Butterflies.
Finish 4 Mini-Games in a row without skipping.
Find 3 hidden-objects within 3 seconds.
Perform 3 Evidence Deductions without a wrong move.
Play through the first hour of the game without skipping any cutscenes.
Finish a game of Pair-Matching in less than 3 minutes.
Finish any Hidden Object Puzzle with less than 4 mis-clicks
Finish any Hidden Object Puzzle in less than 1 minute.
Finish 6 Hidden Object Puzzles in a row without using hints.
Finish all Mini-Games without skipping.
Finish all Hidden Object Puzzles without using hints.
Find all Ethereal Butterflies.
Finish half of all Pair-Matching games.
Find all Illusive Objects.
Finish all Pair-Matching games.
Unlocked all the other Achievements.