It's Super Effective! Achievement in Far Cry: New Dawn
It's Super Effective!15
Headshot an Enforcer with Piercing Ammo.
How to unlock It's Super Effective!
Enforcers are the enemies with the yellow crowns as their ranks next to their health bar. Don’t bother doing this until you’ve crafted an elite sniper rifle, otherwise you will not do enough damage. When you get one, buy some piercing ammo and load up any rank III outpost. There are already enforcers there patrolling. They wear red stunt biker outfits. Fatally headshot any one of them for the achievement.