The Building 21 Key can be found from Supply Drops and Orange Crates in DMZ. Read on to learn about the location of Building 21, how to obtain the key and colored access cards, the secret boss inside, as well as the rewards that you can get from using the key.
| DMZ Key Guides | |
|---|---|
| All DMZ Key Locations | How to Find Building 21 Key |
List of Contents
- Building 21 Location
- How to Get Key Card
- How to Get Colored Access Cards
- Boss Fight
- List of Rewards
- Related Guides
How to Find Building 21 Location
Accessed on the DMZ Level Selector Screen
Building 21 is now currently accessible in DMZ by selecting it on the level selector menu before deploying in a DMZ game. Players will be able to select Building 21 as long as they have obtained a DRC Building 21 Access Card and have it stored in their Key Stash.
Accessible Only at Certain Times
| Building 21 Cooldown |
|---|
| 00:00:00 Building 21 is now live! |
Building 21 will only be accessible at certain times. There will be a cooldown timer on the level selector menu indicating the next available time that players can access it in DMZ.
Unlimited Access to Building 21 Bug
Recently, there was a bug that allowed players to access Building 21 an unlimited amount of times even if they only have one access card. The access card was intended to be removed from their key stash after each use but some players seem to still have it in their inventory.
This bug may be fixed once the cooldown timer ends and the building will be re-added in DMZ again.
How to Get Building 21 Key
Obtained From Supply Drops
DRC Building 21 Access card is the key to getting inside the Building 21 in DMZ game mode. The access card can be obtained in Supply Drops by destroying Supply Planes and the Commander HELO Helicopter with the use of SAM Sites (marked with a White Missile icon on your map).
Upon taking down either of the two, the Supply Drop will be marked on your Tac-Map. This does not guarantee that you will always get the Building 21 Key Access Card, sometimes you'll get the Red Access Card instead.
Obtained From Orange Crates
The DRC Building 21 Access Card can also be obtained inside Orange Crates; these are commonly found in Strongholds, Denied Areas, and locked rooms in DMZ - which requires keys to open. Similar to Supply Drops, the Building 21 Key Access Card will appear randomly by chance in Orange Crates.
All DMZ Key Locations and Rewards
Building 21 Colored Access Cards
How to Get Colored Access Cards
Supply Drops and Orange Crates
Similar to the DRC Building 21 Key Access Card, the Red and Blue Access Cards can be obtained from Supply Drops and Orange Crates scattered throughout Al-Mazrah while playing DMZ.
The Green Access Card can be obtained from drilling safes inside Building 21.
To get a Black Access Card, you have to kill Velikan (secret boss inside) or destroy Wheelson, the sentry bot located near the exfil elevators.
Where to Use Colored Access Cards
Color-Coded Secret Rooms Inside Building 21
Color-Coded Locked Rooms contains high-tier weapons and equipment. Colored Access Cards will give you access to the following locations inside Building 21:
| Colored Access Cards | Unlock Location |
|---|---|
| Blue | Security Room Near Data Storage |
| Red | Security Room Near Office Storage |
| Green | Storage Room South Side of the First Floor |
| Black | Lowest floor (Parking Area) - located along the Basem*nt Hallway |
Building 21 Boss Fight
Velikan
Velikan is the new secret boss found inside Building 21; an alert notification will pop-up on your screen towards halfway through the DMZ match. Velikan's location will always be at the center room on the second floor of Building 21.
Once confronted, he will relentlessly pursue your squad with a grenade launcher until he is killed. Killing him will drop the Black Key Access Card and a RGL-80 Grenade Launcher - which you can safely store in your weapons stash as a contraband weapon after a successful exfil.
Building 21 Rewards
Chimera
The Chimera assault rifle is now obtainable as a reward found in Building 21 after the release of the Season 1 Reloaded version of the game. Players will need to find and extract the weapon from Building 21 in order to unlock it. Extracting the Chimera allows players to use it as a contraband weapon in DMZ.
Chimera is a weapon that was previously only used in the campaign by Ghost but has now been confirmed to be a new multiplayer weapon.
Chimera Assault Rifle
High-Tier Weapons and Equipment
All Weapon Contrabands and Equipment looted from containers and dead AI inside Building 21 have better stats and more attachments equipped than those found in Al-Mazrah. These weapons can be used the next time you launch a DMZ session, provided that you have succesfully extracted with it prior.
Customizations From Weapon Cases
Extracting weapon cases from Building 21 will unlock and reward you with Blueprints, Charms, Calling Cards, Vehicle Camos, and Emblems.
These rewards are considered rare as you can only obtain them while playing DMZ. All customizations can also be used in Modern Warfare 2's Multiplayer game modes where you can show off your newly customized weapons to other players!
All Building 21 Weapon Cases
Warzone 2.0 Related Guides
Tips and Tricks
Warzone 2.0 Tips and Tricks
| Strongholds Guide | What are Buy Stations? |
| How to Ping Enemies | How Does the Interrogation System Work? |
| Best Items to Loot | Can You Play Split Screen on Warzone 2.0? |
| How to Unlock All Vehicle Skins | Best Settings |
| How to Turn On Contextual Tap | How to Refill Vehicles |
| Best Audio Settings for Hearing Footsteps | How to Play Resurgence in Season 2 |
| What is AQ Soldier Kills? | How to Complete Safecracker Contract |
| How to Complete Secure Intel Contract | How to Add People on Warzone 2.0 |
| How to Check Your Warzone 2.0 Stats | How to Play Mini Royale |
| Do You Need PlayStation Plus or Xbox Live to Play? | What Is Assimilation Refill? |
| Can You Still Play Warzone 1? | - |
Battle Royale Guides
| Best Warzone 2.0 Loadouts | Proximity Chat Guide |
| Black Sites Guide | Best Locations to Drop In |
| What is Circle Collapse? | How to Get Your Loadout |
| What is the Gulag? | How to Get the Nuke Contract |
| Best Guns for Warzone 2.0 | Best TAQ-56 Build |
| Best RPK Build | Best Fennec 45 Build |
| Best M13B Build | Best Sniper Class |
| Can You Change Perks? | Ashika Island |
| Is Plunder Coming to Warzone 2? | When Does Jailbreak Happen? |
| What is Restore Honor in Resurgence? | How to Get Sea Treasure Tokens |
DMZ Guides
| All DMZ Key Locations | |
|---|---|
| Ashika Island Key Locations | Building 21 Key and Location |
| Ahmed Grocery Store Key and Location | Far South Eastern Storage Key and Location |
| Taraq Smuggler's Office Key and Location | Power Substation Toolbox Key and Location |
| Yum Yum Burger Back Room Key and Location | Kushaak Construction Warehouse Key and Location |
| Taraq River Supply Shack Key and Location | Downtown Post Office Key and Location |
| Mountaintop Spotter Shack Key and Location | Longshoreman's Duffel Bag Key and Location |
| IHTAQ Warehouse Supply Room Key and Location | South Bank Apartment Key and Location |
| Rohan Oil Control Room Locker Key and Location | Enfer Back Room Key and Location |
| CH7 Secure Records Room Key and Location | Weapons Repair Kit Key and Location |
| Hafid Ship Bridge Cache Key and Location | Scientist's Locker Key and Location |
| South Zaya Scientist Apartment Key and Location | Bank of Adal Office Keys and Location |
| Sattiq Guest Quarters Key and Location | - |
| Other DMZ Guides | |
| All DMZ Faction Missions and List of Rewards | How to Get Weapon Cases and Rewards |
| How to Find the Golden Skull and Ship Cache Locations | How to Complete Secure Nuclear Material Contract |
| Natural Treasure: All Hidden Container Locations | Badge of Honor DMZ Mission: All Police Station Locations |
| Dead Drop Dumpster Location | How to Get Building 21 Weapon Cases |
| How to Get Ashika Island Weapon Cases | - |
