Gunman (Metro 2033 Redux)

Gunman is an achievement/trophy in Metro 2033 Redux.

Overview
This achievement is awarded for killing 100 enemies with shotguns. Any kills, mutant or human, count as long as they are killed with the Duplet, Shambler, Abzats or Bigun. This differs from the Metro 2033 achievement, Gunman, which was awarded for 50 kills with just the Abzats.