Upgrade Machine

The Upgrade Machine is a utility that appears in every Zombies map. For a hefty 5000 points, the player can upgrade their weapons into more powerful versions of themselves. Unlike the Strongbox, it always appears at the same location in a map.

Appearance
It appears to be a heavily modified game machine with a compartment to place the weapon to upgrade it. Electric sparks come out of the machine while it is upgrading the weapon, though they cannot harm the player.

Overview
The Upgrade Machine can only be accessed if the power is turned on, much like the Perk Sodas. It must be noted that upgrading a weapon takes about 10 seconds, so the player must have another weapon to use to hold off the zombies while it is upgrading. If the player does not buy any weapons, and upgrades their starting pistol, they will be left with nothing but their Knife and grenades until it is finished upgrading.

The player must be sure to take their upgraded weapon after it is finished upgrading, as other players may steal it. After about 20 seconds of an upgraded weapon being in the Upgrade Machine without being taken, it will appear as a wall buy in a random location of the map for about 2500 points. Once the wall buy is purchased by the player, it will disappear. If the player does not have the sufficient points, the wall buy will not appear.

Trivia

 * It is possible to glitch the melee knife into the Upgrade Machine. The player must melee and quickly press the action button. While it is upgrading, the player will pistol whip and hit zombies with the butt of their gun if the melee button is pressed. However, the player may not obtain the Knife after it is upgraded, since the melee knife does not have a proper third person model.
 * All upgraded weapons have a metallic texture to it after being upgraded, wires can also be seen on the weapon.
 * In the map Castle, the Upgrade Machine is simply a stone oven that upgrades weapons.