Trepang2
49 Achievements
GOG
You're a Firework!
Shoot an enemy while he’s thrown as a hostage grenade, detonating his grenade
17.0%
How to unlock the You're a Firework! achievement in Trepang2 - Definitive Guide
Make sure you have full or close to full slowmo, grab an enemy and throw him with LT. The nade is the blinking red spot on him, use the SMG or AR to shoot it, the hitbox is really generous.