All players must now obtain the One Inch Punch and upgrade it by hitting around 20 Crusader Zombies each inside the Dig Site with it. Merely hitting the zombie is enough, and the players do not necessarily need to kill the zombies with it. Once the player has hit enough zombies, a tablet with a white glow will drop, which can be picked up to obtain the Iron Fist, the upgrade for the One Inch Punch.
All players in the game must obtain the Iron Fist. It is recommended to not hit Crusader Zombies that are yet spawning and coming in through the walls, as the tablet can drop out of the player's reach, making the rest of the Easter Egg impossible to complete.