Performed in the "Dread Rain" campaign, chapter "Sugar Factory"
There are a lot of Witches in this chapter. With bots, getting this achievement is quite easy. Up to 10 Witches can be encountered in this chapter.
Your task is to reach the shelter without killing a single Witch. Also don't forget to turn off the flashlight, as it draws their attention. Bypass the Witches and you will succeed. If your partner scares or kills the Witch, no one will get the achievement.