Here is the full list of all 16 The Night is Grey achievements.
Complete chapter 1
Complete chapter 2
Complete chapter 3
Complete chapter 4
Complete chapter 5
Complete chapter 6
Explore every room in the mines
Get Hannah’s opinion on stuff, whether you like it or not
Clean your glasses more than 10 times
Find Storky's special interaction
Read all diaries/ documents
Boil the 3 red items
Get eaten by the wolves
Ask lots of questions.
Look at all photos in the game
Get Graham tired