Like the previous episode, this trophy can be gotten simply by completing the final stage of Episode 2 entitled "Overlord". While this means you won't have an array of weaponry at your command, the level contains numerous weapons and ammo so if you want to easily get this trophy you can simply start from there. Keep in mind that cheats do not disable trophies so you can no clip to the boss and give yourself the weaponry to take them down easily.