Here is the full list of all 32 When the Darkness comes achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Try to escape from the platform.
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You have reached the end of the journey.
Find your light.
Reach the end of the second run.
Choose Knowledge as your purpose in life.
Choose Happiness as your purpose in life.
Choose Money as your purpose in life.
Choose Fame as your purpose in life.
Choose Creation as your purpose in life.
Find the Speed Ninja easter egg.
Put the ball in the goal.
Try to find meaning where there is none.
Discover the Sunny School.
Get a different answer.
Discover the Sunny City.
Discover the Sunny Factory.
Relaunch the game after the first run.
Survive the first run.
Select no purpose in life.
Run away from your fears.
Go behind the Hermitage.
Successfully reach the end of the platforms.
Find all the clocks in the School level.
Discover the secret room.
Progress in the Metro.
Find the Light at the end of the Bridge.
Try to escape in the City.
Wait a long time before pressing the first button.
Wait a long time for that first red door.
You won the game!
Try to exit the game by conventional means.