Here is the full list of all 20 The Town of Light achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Unlock Final chapter
Finally, a place to rest
Someone is freshen
They used to work in the garden
Unlock Chapter 12c
He still has a name
Life thrives there
They try to hold the pieces together
Unlock Chapter 6a
Unlock Chapter 5
A secret place under the massive wall
Unlock Chapter 6b
Unlock Chapter 12a
Unlock Chapter 12b
Unlock Chapter 12d
Taste of Tuscany wine
Find all the drawings
You know the truth
Find the first part of Renée's diary
Find all of Renée's diary entries