Note : as of June 18, 2019, aka the release date of killer Ghostface, this achievement is unobtainable on all supports 😢
As of July 23, 2019, ake the 3.1.0 Freddy Mid-Chapter, this achievement can now be unlocked again 😁
So this achievement requires you to use an ultra rare item or add-on, which are the Pink items.
The ultra rare/pink items you can use are :
-The Skeleton Key
-The Rainbow Map
The ultra rare add-ons you can use are :
-The Odd Bulb for flashlights
-The Anti-Haemorrhagic Syringe for Med-Kits
-The Brand New Part for Toolboxes.
The achievement popped when I escaped through the exit gate with my key, if anyone can confirm if you have to survive for it to pop I'd add it to the guide 😊