This War of Mine: Final Cut

You need the "All expansions pack" add-on.

In order to get this achievement you have to make a child reach the "broken" state, then take care of him until he reaches the "sad" state.

I was playing normal (game with 1 adult and 1 adult + his daughter), so when I decided to go for this achievement, I stopped feeding the father and his daughter, at night I put always the father on guard and did not put the girl to sleep in a bed, finally the father died, at that moment the girl reached the "broken" state, from then, I began to feed her and talk to her every day with the other adult, in a few days she reached the "sad" state and I got the achievement.

Select My own scenario.
Choose 1 adult and 1 adult + his/her child.
Days until ceasefire: doesn't matter.
Intensity of the conflict: low.
Winter comes: never.
And select the places on the map you want to have access.