Here is the full list of all 35 Little Nightmares II achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Your life is now free of challenges. Congratulations
Hold tight and we'll be just fine
You punctuated someone's day. Maybe they'll notice!
Hello, have we met?
Nothing of us remains in the pale city
Nothing of us remains anywhere. Bravo!
It's crueller to let him live
Hats are very important to some people
Any other last requests?
Nothing of us remains in the hospital
Some holes are more picky than others
My, what a curious song you play!
Nothing of us remains at the school
Tempting, so tempting...
Creative, efficient, brutal. Top of the class!
Rebellion at its finest!
It's not murder if they're bad people... is it?
Nothing of us remains in the wilderness
What did you expect to see in there?
Not today!
Perfect! It's so... you!
It's all over now
Life in the big city is all over
It would be cliché to collect them all
Are you sure you don't need any further... treatments?
I see through you...
Movie night on the ward - all taken care of!
There, you'll be much warmer now
Better to be safe than sorry
Plenty of snacks for a growing boy
Best days of our short, terrible life
You never know when you need protection from the elements
Relax, she heard you!
Unorthodox, but they all count!
Nature is a terrifying thing