Easy way for Opium Scourge Trophy Assassin's Creed® Syndicate

In Sequence 5 - Friendly Competition Sequence 5 - Friendly Competition. Later in the mission you will be given the task to "Push the cart full of explosives". At that point you'll want to get to the roof of the building in front of you and get your hallucinogenic darts ready. There will be a few enemies standing around a fire pit next to the cart, you'll want to wait until two more enemies walk up to them and join them. Now take your dart, aim at the fire pit with Right Analog, and fire with R2. If done right, it should hit the fire pit and affect the four enemies standing around it, awarding you with this trophy. Don't forget to subscribe!!