Trigger Happy

Trigger Happy is an achievement/trophy in Metro 2033 Redux.

Overview
This achievement is awarded for killing 100 enemies with assault rifles. Humans and mutants both count towards this. The Bastard, Kalash and Kalash 2012 all count. This must be completed in one playthrough, but you can restart chapters to farm kills.

Trivia

 * The background associated with this achievement shows a Gatling, even though it is not classified as an assault rifle and thus unrelated to this achievement.