115 Normal Zombie Headshots - Rewards Lamentation / Afterburner / Spatz-447 / Agarthan ReaperĢ. If you aim at each medal it will bring up a challenge. In the spawn, up the stairs to the left is a 'Ritual of the Ancients' board that has challenges for you to complete (another out by Generator Station 6). I highly suggest setting it to Easy difficulty. This can be very difficult because of the challenge to fill 4 chests.
