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.
Complete a Hidden-Object Puzzle in less than one minute.
You found four objects in four seconds in a Hidden-Object Puzzle.
Complete a minigame in less than one minute.
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.
Fix the sailboat.
Find the lighthouse without getting lost.
Swim to the Devil Island without getting lost.
Unmask the Hookman.
Get out of the trap.
Complete all minigames without using the Skip button.
Unlock all achievements.