Step One: Overriding the Corruptions Edit
In each of the four main areas of the map (Spawn, Mob of the Dead, Der Eisendrache and Verrückt), there are four altar like devices in front of a large pillar in each area. Interacting with each of the altars will cause several different enemies to attack the player. The player must hold out until the corruption is destroyed, allowing access to Nacht der Untoten.
Step Two: Stopping the Giant Apothicon Edit
Once all four corruption engines are complete, head to the second floor of Nacht der Untoten and head over to a terminal like device. Once the massive Apothicon flies in front of the terminal, activate the device with the action button, causing several Death Rays to freeze the Apothicon in place. The player can now enter the Apothicon's belly by walking up to its mouth.
Step Three: Freeing the Pack-a-Punch Machine Edit
Once inside the Apothicon, the Pack-a-Punch machine can be found within the beast's heart. By shooting the three giant yellow spores attached to each side of the heart, it will cause the Pack-a-Punch machine to drop below, allowing it to be accessed and unlocking the achievement.