Here is the full list of all 22 Ghost Files: The Face of Guilt achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Finish all the Minigames without skipping them.
Defeat the Killer.
Find all collectibles.
Find 30 collectibles.
Discover the identity of "The Guilty Man".
Complete your ballistic forensic analysis.
Defeat one Soul Collector.
Locate the Killer's hideout.
Disable three security cameras.
Get rid of one guard.
Finish any Hidden Object Puzzle with less than 4 mistakes.
Complete a Hidden Object Puzzle in less than a minute.
Find Anna Frick.
Put out the flames.
Find 3 Hidden Objects within 3 seconds.
Finish 3 Hidden Object Puzzles in less than 10 minutes.
Finish 3 Hidden Object Puzzles without a hint.
Compare two blood samples.
Complete your first forensic analysis.
Complete a Hidden Object Puzzle without a Hint.
Complete a Minigame in less than a minute.
Find one collectible.