The Yum Yum Burger Back Room Key is an item that can be found in the DMZ mode in Warzone 2. Like other keys, it opens up a locked location on the Al Mazrah map, and as the name suggests, it’s specifically for the Yum Yum Burger joint.
I’ve found the key in three ways—by killing AI enemies, searching loot containers, and completing HVT contracts. The odds seem to be about the same, so it doesn’t really matter which one you choose.
Once you’ve found it, you’ll need to make your way to the Yum Yum Burger shop itself and access the Back Room to enjoy the spoils. Given how big the map is, this can be tough if you don’t know where to look.
Where to find the Yum Yum Burger Back Room in Warzone 2 DMZ
After obtaining the Yum Yum Burger Back Room key in DMZ, players will need to head to the heart of Al Mazrah city, found in the northeastern part of the map. The burger shop is near the center of the city.
The exact location of the building can be seen at the center of the screenshot below.
Once players spot the Yum Yum Burger shop, simply enter through the main doors and turn left at the cash registers. Take the first door on your right and through this entry should be another door, but one made of metal with an “X” written across it. Just interact with the door to gain access.
Related: DMZ key locations: Where to use every key in Warzone DMZ
Be warned, though. This area is a massive hotspot for both players and hostile NPCs, so be prepared for a fight before you enter. I’ve been involved in so many skirmishes while trying to open it, so it’ll probably be the same for you. I recommend starting off at a good landing spot and scoring some decent gear beforehand.
As for the content inside the Yum Yum Burger Back Room, it has several floors filled with what I’ve found to be pretty useful items. A bit of luck is involved, but if it’s on your side, you might find something amazing.