This is story related and cannot be missed.
Entities are paranormal creatures that will attack Jodie. You can eliminate Entities using Aiden.
The trophy can be obtainable in any of these chapters that Entities make their appearance:
Chapter 11: First Night (This will be the most common one when playing through Story Mode)
Chapter 14: Navajo
Chapter 23: Dragon's Hideout
Chapter 24: Black Sun