Revenge

Revenge is a hidden achievement/trophy in Metro Last Light and Metro Last Light Redux that can be obtained in the Red Square level.

Overview
This achievement is awarded to the player for leaving Pavel to die during Red Square. As you can choose whether or not to let Pavel die, this achievement/trophy is missable. It also garners the player a lot of negative moral points that will likely give the player the C'est la Vie ending, so think thorougly what consequences your actions might have before deciding Pavel's fate.