Fallout 76 Nuke Codes: How Launching a Nuke Works

Launching a nuke in Fallout 76 takes three things: a weekly launch code assembled from eight code pieces, a Nuclear Keycard pulled from a guarded Cargobot, and access to one of the three silos at Site Alpha, Site Bravo or Site Charlie. The Fallout 76 nuke codes themselves change every week, so we do not print them here; a code copied from an old page simply fails at the console. What follows is the full process as of November 2026, from unlocking the Whitespring command center to surviving the blast zone and fighting the bosses it can summon.

We checked this against the Fallout Wiki's pages on I Am Become Death, Nuclear Keycards, silo code pieces and blast zones, plus Bethesda's Burning Springs, The Backwoods and Infestations release notes, in November 2026.

What You Need Before Your First Launch

Nuclear launches are locked behind the Enclave main questline. The chain runs through Uncle Sam, Bunker Buster, One of Us and Officer on Deck before it reaches I Am Become Death, the quest that actually teaches you to launch. By that point you have been promoted to general, and MODUS opens the final section of the Whitespring Bunker for you.

Inside the command center, the quest asks you to complete four nuclear training tutorials, although a Command Terminal lets you skip them. MODUS then sets three goals: acquire a Nuclear Keycard, collect the silo code pieces, and learn how the codes are encrypted. The quest completes the first time you launch a missile, and it rewards 2,000 XP according to the Fallout Wiki.

• Quest chain: Uncle Sam, Bunker Buster, One of Us, Officer on Deck, I Am Become Death.
• Hub: the Whitespring Bunker command center, where the tracking terminal lives.
• Requirements per launch: one Nuclear Keycard, a decrypted launch code for the silo you choose, and a cleared silo.

It is a long questline with several dungeons, so give yourself a few sessions rather than trying to rush it in one evening. The good news is that the setup is a one-time job: once you are a general, every later launch only needs fresh code pieces, a keycard and a silo run.

How Code Pieces Work and Why Codes Change Weekly

Each silo has its own launch code, split into eight pieces. You collect them by killing Scorched Officers and Feral Ghoul Officers, the enemies with a field radio strapped to their backs. Every officer drops one letter and number pair, and the pieces are added to the command center automatically, where they show up as a scrambled string.

The characters on each piece change every week. The Fallout Wiki notes that code pieces expire weekly on Monday no matter when you picked them up, and the game warns you before they disappear from your inventory. That weekly reset is why any list of codes has a shelf life of days, and why we explain the method rather than publish numbers.

Finding officers is easier with the tracking terminal. Triggering a surveillance sweep starts the repeatable quest Hide and Seek and Destroy, which marks the rough location of either a code piece carrier or a keycard convoy. Run it repeatedly to hunt down all eight pieces for the silo you want.

The decryption step follows the quest's archive trail. You read General Santiago's notes in the command center armory, which point you to the Fujiniya Intelligence Base. Inside, the lone terminal behind the blue Fusion Generators accepts the password from the bunker and produces a usable launch code. It is a one-time trip that teaches you how the encryption works, and after that the weekly routine is mostly about collecting all eight pieces again. Bethesda's Burning Springs notes also fixed incorrect display names on silo code pieces, so older screenshots of the pieces may not match what you see now.

Getting a Nuclear Keycard

The keycard is the other half of every launch, and it is consumed in the receptacle whether or not your code is correct. Keycards only come from secure transport containers carried by Cargobots, and Hide and Seek and Destroy can point you to a convoy.

Expect resistance. The Fallout Wiki says the Cargobot is escorted by up to three Vertibots, which fire on anything they see as a threat, so clearing the escorts first makes the takedown easier. Once the container is down and you pick its lock, a self-destruct countdown starts with five minutes on the clock and an audio warning for the final ten seconds. Grab the keycard and any other cargo, then move away before it explodes.

The container's loot is instanced, so every player who reaches it can take their own keycard. If a keycard Cargobot is destroyed, a new convoy spawns 20 minutes later. Picking this particular lock also does not give you a bounty, unlike locks owned by players.

• Shoot down the Vertibot escorts before focusing the Cargobot.
• Pick the lock only when you are ready to loot quickly.
• Team up: each teammate can loot a keycard from the same container.

Inside the Silo: Mission Countdown

Each silo is a dungeon of its own, covered by the Mission: Countdown quests. Expect heavy robot resistance and a high radiation zone in the reactor chamber that lingers until you shut down and repair the reactor. A strong suit of power armor makes the trip far easier, and our power armor comparison explains which sets protect best against both robots and radiation.

In the Launch Control Center, the order is fixed. Insert the Nuclear Keycard into the marked terminal, enter the decrypted code at the terminal opposite, then use the main console between them to pick your target on the map and confirm. Parts of Appalachia are a protected zone where low-level players do their early quests, and a strike cannot be launched if any part of its radius would touch that area.

Pack radiation consumables before you go in. After the Infestations update in June 2026, Rad-X grants 300 radiation exposure resistance and RadShield 600, and Bethesda notes that both still end up stronger than before because the whole resistance formula became more effective. RadShield, Glowing Blood Packs and Irradiated Blood Packs can no longer be stacked by consuming several in a row, so one dose is all you get at a time.

After a launch the silo goes quiet for a while. The Fallout Wiki lists a three-hour lockout on the silo you used in that world, and the same silo is unavailable to your character across every world for three real-world hours. If you plan multiple launches in one night, rotate between Alpha, Bravo and Charlie.

Surviving the Blast Zone

Once you confirm a target, the quest Death from Above! begins for everyone on the server, sirens sound, and the missile lands three minutes later. Anyone inside the radius at impact is killed instantly unless they are in an interior cell. The resulting blast zone stays on the map for two hours.

Radiation inside the zone is severe unless you wear power armor, a Hazmat Suit or Chinese Stealth Armor. Two recent updates changed the details. The Backwoods made nuke zones deal more radiation to players in power armor who are not fully suited up, which Bethesda defines as a full set plus Rad-X. Infestations then made radiation resistance much more effective, saying that 1,500 to 2,500 radiation resistance dramatically reduces heavy environmental radiation such as nuke zones.

The zone is also a farming spot. Enemies killed inside can drop glowing loot such as Glowing Mass and Hardened Mass, and nuked flora yields the raw Flux used in high-end crafting. Ghoul characters treat it differently, since radiation fuels their Glow; our guide to becoming a ghoul explains how that system works.

Nuke Targets and the Bosses They Summon

Where you aim decides what happens next. Three locations trigger boss public events when they fall inside the blast radius, and the location only needs to be somewhere inside the zone, not at the exact center.

• Fissure Site Prime: starts Scorched Earth, where the Scorchbeast Queen emerges. A team of eight is recommended.
• Monongah Mine: starts A Colossal Problem against Earle Williams, a Wendigo Colossus, with a limit of eight players per instance.
• Abandoned Mine Shaft 2: starts Seismic Activity, where the Ultracite Titan surfaces with Mole Miners and Mole Rats.

The Backwoods gave these fights better loot. The Casual Style under armor mod now unlocks from nuke boss events, the unique Rage raider armor drops from Earle, and the unique Last Stand recon armor drops from the Nuka-World on Tour nuke boss. For the damage side of these fights, our builds guide for the current season covers setups that hold up in long boss events.

Two trophies are tied to all of this. I Am Become Death is the Gold trophy for finishing the launch quest, and Ground Zero is a Silver trophy for being at ground zero of a nuclear blast. If you are working toward a full trophy list, plan both into the same launch night with your team so nobody has to repeat the whole keycard and code routine.

Want Help With the Rest of the Grind?

Nuking a boss is the fun part; funding the ammo, repairs and plans around it is the slow part. The store's Fallout 76 hub lists caps and boosting services for the game in one place, so you can see what is available on your platform before your next launch night.

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