You can unlock this trophy at the beginning of the island mission. Once you land on the island, follow the path up to the hill. Here is where you can obtain this trophy: Equip the sniper support before you make your way down the hill. You will see your first enemy at the bottom of the hill, use your sniper support to take this enemy out. There will be two more enemies across the small river, use your sniper support to take them out. Make your way up to the enemy territory and purposely get killed. You will restart at the top of the hill. Rinse and repeat this process until trophy pops. Happy Gaming!