Carmaheddon

Carmaheddon is a secret achievement in Metro Exodus that can be obtained in "The Caspian" chapter.

Overview
This achievement is obtained upon killing 50 enemies by running them over with Saul's van. It's unlikely this achievement can be recieved by casual playing, as seeing large groups of enemies close to roads and easily traversable terrain is not common. Instead, one will specifically need to "hunt" for road kills. Good victims are humanimals, as they often appear in moderately large groups.

This achievement dosen't need to be obtained in a continuous gaming session, so an easy way of obtaining it is to find a group of enemies that can be run over, quicksave, hit the enemies with the van, reload the quicksave and do it again and again, until enough road kills are "farmed".