How to get a Building 21 Keycard and enter Building 21 map

Learn how to find rare Building 21 Keycards in Call of Duty: Modern Warfare II DMZ. Discover the best methods to secure these keys for the exclusive map.

Alright, so you wanna get into Building 21, huh? It's a bit of a process, but totally doable. First things first, you need a special keycard – not like the regular Stronghold ones, these are way rarer.

The best place to find these Building 21 keycards right now is in supply drops. You know, those orange boxes everyone fights over? It seems like you're pretty much guaranteed to find a keycard in one of them.

You can get supply drops in a few ways:

1. The ones that drop from planes flying overhead.
2. You can take over SAM Sites, which shoot down planes and drop packages.
3. There's also a boss supply drop you get from taking down a boss marked with a white skull on the map.

Just go for whichever method works best for you. Loot up those keys and other good stuff from Al Mazrah in DMZ mode.

Once you've snagged a Building 21 keycard, you need to extract with it. Seriously, extracting with the keycard is a must if you want to get into the Building 21 level. Think of it like the Labs map in Escape From Tarkov – pretty intense.

How to enter Building 21 in DMZ mode

Okay, so you've got your keycards and you've successfully extracted with them. Now you can actually enter Building 21. Quick heads-up: at the moment, Building 21 isn't actually live in the game. The devs confirmed it's not launching right away with the Reloaded update, but will be stealth patched in. So, keep your eyes peeled for it!

Raven Software mentioned in the patch notes: “Mysterious new keys have arrived in Al Mazrah… but where do they lead? Limited intel on access to the biological laboratory known as Building 21 will take players outside of Al Mazrah and into a hyper-dangerous new area of DMZ.”

But once it's live, we're pretty sure you'll be able to queue for it directly from the DMZ menu. There are a couple of big clues for this. First off, there's a level select option in DMZ now, which wasn't there when Warzone 2 and DMZ first dropped. Second, the devs said Building 21 isn't in Al Mazrah, which strongly suggests it's its own separate map.

So, for now, your best bet is to just stack up on those DMZ Building 21 keys and extract with them. That way, when the map eventually stealth launches, you'll have a bunch of keys ready to go. You can dive in, grab all the high-tech loot, and even unlock that new Chimera weapon if you're feeling it.