Riot Rocker Trophy

Riot Shield Enemies carry large riot shields that make them difficult to shoot from the front. There are several of them in the game and you can earn the trophy just playing naturally. To run over the riot shield, run up to a Riot Shield Enemy and press . Sometimes they will push you back, and sometimes you will run over the shield and end up behind the enemy. Once you're behind them, press again to perform a stealth kill. Do this five times to obtain the trophy.

You can also knock down a Riot Shield enemy by shooting the riot shield. This will allow you to run over the shield with ease. Once behind the enemy, press for the kill. There is a Riot Shield enemy at the very beginning of Chapter 15 - Sink or Swim if you want to farm this trophy.