Righteous Vengeance

Righteous Vengeance is a secret achievement in Metro Exodus that can be obtained in Yamantau level.

Overview
This achievement is obtained by killing a total of 90 cannibals in Yamantau. Playing this level casually might not be enough to receive this achievement, the player should try to be more methodical, especially towards the end, where many cannibals can simply be left behind without killing them - make sure to slow down your pace and kill every single cannibal encountered, the level isn't time-limited.

It is not required to kill all 90 in a single run. If you didn't unlock this achievement/trophy on your first playthrough, you will most certainly get it by replaying the level.