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.
Find all of Renée's diary entries
Find the first part of Renée's diary
Unlock Chapter 12c
Unlock Chapter 12a
Unlock Chapter 12b
You know the truth
Unlock Chapter 6b
Find all the drawings
Unlock Final chapter
They used to work in the garden
Someone is freshen
Taste of Tuscany wine
Finally, a place to rest
Unlock Chapter 12d
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