Here is the full list of all 13 Left in the Dark: No One on Board achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Finish the game in Expert Mode.
Complete all Hidden-Object Puzzles without using the Hint button.
Complete a Hidden-Object Puzzle with no more than three mis-taps.
Find the lighthouse without getting lost.
Unlock all achievements.
Unmask the Hookman.
Get out of the trap.
Complete all minigames without using the Skip button.
Swim to the Devil Island without getting lost.
Fix the sailboat.
Complete a minigame in less than one minute.
You found four objects in four seconds in a Hidden-Object Puzzle.
Complete a Hidden-Object Puzzle in less than one minute.