DMZ: All Building 21 Access Card Locations & Secret Rooms

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On the DMZ map Building 21 in Warzone 2, you can find various key or access cards. In our guide we will tell you which access cards are available, where you can find them and what they are good for.

Here’s what’s going on: The new Warzone 2 DMZ map called Building 21 offers you a total of 4 different key cards. A fifth one, if you count the access card you have to find in Al Mazrah to even enter Building 21. Today we’ll explain what the black, blue, green, and red key cards are and where you can find them.

These are All the Key Cards on Building 21 in DMZ

Unlike the standard access card, which stays for a week and gives you access to Building 21, you can use the rest of the key cards only once. However, you can collect them and take them again and again, as long as you don’t use them up or lose them.

The Blue Access Card

Here you can find blue Access cards: You can find the blue key cards, like the standard access card, on Al Mazrah. You can find them in orange crates and supply drops:

Air Drops: planes often drop supply crates over the map, secure and search them.
Boss Supply Drops: Kill a boss, like the Chemist, and loot his supply crate.
SAM Site Drops: Capture an air defense and complete the associated tasks. Then loot the drops.

You can also find the blue key cards inside building 21. However, they are distributed quite randomly and can be contained in bags or in defeated enemies.

You will need blue access cards for this: go to the data center on the first floor, where you also need to go when collecting weapon crates and go to the room opposite. Directly on the left, you will find the blue door to open. Here you will find orange supply boxes, gas masks, revival kits, money, and more.

The Red Access Card

Here you can find red access cards: You can also find the red key cards on Al Mazrah. Also in orange crates and supply drops:

Air Drops: planes drop supply crates over the map more often, secure and search them.
Boss Supply Drops: Kill a boss, like the Chemist, and loot his supply crate.
SAM Site Drops: Capture an air defense and complete the associated tasks. Then loot the drops.

Also in building 21 you can find randomly distributed red key cards. Either in various boxes and bags or in defeated enemies.

You will need red access cards for this: Open the red door on the second floor in the offices at the northern end of the map. Here you will also find plenty of high-quality loot.

The Green Access Card

Here you can find green access cards: The green key cards cannot be found on Al Mazrah, but only on building 21. They are also not dropped randomly by enemies. Instead, you get them when you open safes in secured zones. These zones are always somewhere else, for example on the second floor in the archive room or on the first floor in the generator room.

For this you need green access cards: With the green key card you open the green doors, of course. There are also several of these in building 21, but they are all on the first floor in the garage and the surrounding area. Here you will also find the same loot as with the red and blue key cards:

The Black Access Card

Here you can find black access cards: The black key card is guaranteed to drop the boss in building 21, but Velikan only appears later, about halfway through the timer. He is a tough guy and hard to defeat. Our Velikan guide will tell you, how to beat him.

You will need black access cards: The room with the black door can be found on the first floor again. From the garage, walk along the southern corridor towards the west, and you will come across the door with an engraved circle on it. The room is secret and therefore not marked on the regular map that you can find on every staircase. Here again, you will find plenty of loot and weapons.