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