Throughout the game you will be presented with choices to choose a evil or good mission. Most of them don't matter for any specific trophy except for the last choice before the final boss battle. Choose and complete the
Good Mission (blue mission) that starts on top of the building across from the Channel 6 News Tower to get this trophy.
If you want to know what the mission is, hit the spoiler below:
*** Spoiler - click to reveal ***After dealing with Hank, you head over to the Channel 6 news tower. On a building opposite of the tower is the transformer (don't worry when you get to the tower it will put a map marker on the correct building to go to). When you land on top of the building, two missions will spawn, the good mission Expose Augustine will get you down the path for this trophy. You will get up to the top of the tower with the help of Fetch and Eugene, and then face Augustine (the same way you did out on the concrete platform in the water). Once she is defeated in that form she will turn into a concrete monster, and after defeating her this way, the trophy will pop near the beginning of the credits (sometimes takes a bit).