Here is the full list of all 27 Through the Woods achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Opened all doors
Found Pesta, the plague maiden.
Read all texts
Found all collectibles
Found all abandoned children
Found all folklore items
Killed by a draug
Found all dwarven gates
Killed by one of the brothers
I live, I die, I live again
Killed by Særimne
Killed by Huldra
Found all reflectors
Killed by a troll
Complete chapter 5
Complete the game!
You need two to make a pact
Complete Chapter 4
Relieved Garm from his pain
Completed chapter 3
Found the Red Hood
Complete Erik's Cabin
Found the little heroes' toys
Completed chapter 2
One was the king who won, two were defeated
Completed chapter 1
Completed chapter 0