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Note: This trophy is glitched in the fact that PhD Slider must be your fourth perk equipped so that you can have the modifier active on it. The trophy does not pop without the modifier active.

To get the PhD slider, you will need to reach Level 42 in Zombies. You can also use the Secret Sauce perk to have a shot of getting the PhD Slider at the beginning of your game. Be sure that your final perk equipped is either PhD or Secret Sauce. Once you have done that, then head into your game. A good map to try this out on is Blood of the Dead: There are a lot of high vantage points throughout the map that can be used to get your requirements completed.Once you are in, you'll need to unlock your perk in-game. To do that, you'll need to find all the perk machines located throughout the map. Below are the locations:

• Power House
• Docks Bridge
• Infirmary
• The Warden's Office

Once you have ten Zombies piled up, then you'll need to slide with  as you land. If you don't do that, then you'll mess up and have to try again. Once you slide into a Zombie, then you'll detonate and cause other Zombies to die around you.If you're unable to have someone to help you, then it's best to grab a Monkey Bomb (found in Mystery Boxes or  and throw it to attack the attention of Zombies briefly as it'll buy you time to attempt this trophy.

The Doctor is In Visual Guide

Credit to Maka91Productions for the video.