In order to obtain this Trophy, you must complete the quest Taken For A Ride.
After arriving at Nuka World for the first time you must face a number of challenges. The first is surviving a gauntlet of traps, turrets and other enemies until you reach the Cola Car Arena.
Here you must fight and defeat the Raider boss of Nuka World. Unfortunately, he is hiding inside a supercharged set of power armor. Using a line attached to the ceiling, Colter is completely immune to damage thanks to the additional power. Before entering the arena, pick up the Thirst Zapper inside the locker room, Gage should tell you about it through the intercom.
The Zapper will power down the armor for a short time, allowing you to inflict damage. Once the overboss is defeated, speak to Gage on the other side of the arena and the quest will be completed, unlocking the trophy.