Perk Booster Machine

"Man, I have to pay TWICE as much as I payed the first time. At least I'm getting something better."

- Tank Dempsey when upgrading a Perk-a-Cola.

The Perk Booster Machine is a utility that first appeared in Schule der Untoten and continued until End. It costs twice as much as the perk that is being upgraded. The upgrade a Perk-a-Cola, the player must by the perk they want to upgrade and quickly press the left arrow on the D-Pad (XBox 360 and PS3) or the on the number 4 (PC.) Doing this will cancel the usual tossing of the almost full perk bottle and instead, the player will put the bottle on their belt. When you go over to the Perk Booster Machine, all you have to do is click the on the use button on the XBox 360, PS3 and PC. After a couple of uses, the Perk Booster Machine will teleport to another location on the map.

How to Unlock/Locations
Only a few maps require the machine to be unlocked.

Schule der Untoten: Unlocked after completing the Return from Darkness major easter egg. Behind a wall that requires the key dropped by the zombie boss.

Platzieren aus der Tot: On the third floor inside the conference room.

Wahnsinnig der Kirche: In the bell tower, behind the ropes. Requires the Machete to cut through the ropes.

Krankenhaus aus Verdammten: In the Mortuary in the basement.

Geist Wohnhaus: In the backyard, in a shed.

Einen Langsamen Tod: Unlocked after completing the An Old Friend minor easter egg. Inside the Panic Room that requires an axe to get open.