This trophy is gained from killing 20 "Heavy Hitter" enemies. Heavy hitters are the more difficult to kill enemies encountered throughout the game:
- Crow: These are the enemies that can change into a murder of crows to avoid your damage.
- Fireman: The large armoured enemy that shoots fireballs at you.
- Motorised Patriots: The large robots with the face of a president. These carry a crank gun and have a weak spot on their backs
- Sirens: Ghost-like enemies that resurrect enemies
- Handymen: The large enemies that have a visible heart. These are possibly the most difficult enemies to kill in the game
Killing any of these enemies will count as a kill towards the achievement. This can easily be obtained without focusing on it as there are far more than 20 in the game.