Section 8: Prejudice

This trophy is practically identical to Face Melter, simply go into offline trivial swarm and shoot at enemy until their shield is gone and their life is just under 25%. Then with the Sensor Beacon equipped fire at the enemy; it might take two shots to kill them but if done correctly if will say you have killed them with a skull and crossbones instead of a picture of a gun or grenade and the trophy will pop. Here is a video for some extra clarity; I would like to say that your loadout can be changed in game, doesn't have to be before, and although I suggest trivial easy is fine too, displayed by this video.