Borderlands 4: One Fell Swoop Mission Complete Guide

Getting stuck on the “Talk to Zadra” step in Borderlands 4’s One Fell Swoop mission? You’re not alone. This main story quest in The Fadefields has been giving players headaches with a persistent glitch, but don’t worry – we’ve got you covered with proven fixes and a complete walkthrough.

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The Infamous Talk to Zadra Glitch (And How to Fix It)

Before we dive into the mission walkthrough, let’s tackle that annoying bug that’s probably brought you here. The Talk to Zadra glitch is frustratingly common, but there are several ways to get past it.

What Happens During the Glitch

When you start One Fell Swoop after completing “A Lot to Process,” you’re supposed to talk to Zadra to progress the mission. Instead, many players find themselves stuck watching Zadra loop through animations without any dialogue options appearing.

Quick Fix Methods:

Wait it out first – Let Zadra finish her computer animation loop completely. She should eventually walk down the stairs and position herself between two Ripper canisters. This simple patience often does the trick.
The save file workaround – If waiting doesn’t work, try this proven method:
- Create a new Cazador de bóvedas save file
- Skip through the prologue completely
- Load into your new character briefly, then quit to main menu
- Switch back to your original Vault Hunter and attempt to talk to Zadra again
Consejo de prevención – Talk to Zadra immediately after finishing “A Lot to Process.” The longer you wait between missions, the more likely the glitch becomes.

Consejo profesional: Gearbox is aware of this bug, so a permanent fix should arrive in future updates. Until then, these workarounds have helped thousands of players get unstuck.

If you’re new to Borderlands 4 and encountering multiple issues, check out our Guía para principiantes de Borderlands 4 for essential tips that can help prevent common problems.

Complete One Fell Swoop Mission Walkthrough

Once you’ve successfully talked to Zadra (phew!), here’s your step-by-step guide to completing the rest of this action-packed mission.

Phase 1: Infiltrate Sol’s Production Facility

After your conversation with Zadra, follow her to exit the secret base. Your next destination is Sol’s Production Facility, located just north of your current position in the Dissected Plateau area.

Key steps:

Enter the facility and immediately take the right-hand door
Clear out all Order production line guards (they’re pretty standard enemies)
Head to the northwest corner and interact with the computer terminal
Continue deeper into the facility to find the synth processor valve chamber
Open the valve, then shoot it to destroy it completely
Return to the main entrance where Zadra will be waiting by an elevator

Combat tip: The guards here are fairly easy, but watch out for explosive barrels that can work for or against you depending on positioning.

Phase 2: Master the Locust Container Mechanic

This is where One Fell Swoop gets interesting. You and Zadra will encounter an armored door that’s completely impenetrable to normal attacks.

The grapple hook solution:

Look above the armored door for a vent opening
Use your grapple hook to pull the vent cover off
Jump through the vent to access the lab area
Clear out enemies in the lab
Find the switch on the south wall to activate Locust containers

Understanding Locust containers: These are your new best friends. You can grapple them and throw them at specific white doors that are otherwise invulnerable. Think of them as biological door keys.

Grab a Locust container with your grapple hook
Throw it at the white door to open it
Grab another container and throw it at the southeast door in Zadra’s room

Phase 3: Bio-Bulkhead Boss Fight Strategy

Past the vending machines (perfect time to stock up!), you’ll face the Bio-Bulkhead boss. Don’t let his intimidating appearance fool you – he’s got a specific weakness you can exploit.

Boss mechanics explained:

The Bio-Bulkhead starts completely armored and immune to damage
Look for Locust containers at the central corners of the arena
Throw a Locust container at the boss to strip his armor
Once armor is removed, his health bar turns yellow
Elemental advantage: Use Corrosive or Cryo weapons for maximum damage

Strategy note: Keep moving and prioritize grabbing fresh Locust containers over sustained fire. His armor regenerates, so you’ll need to repeat this process multiple times.

Having trouble with the boss fight? This is a great mission to test your Vault Hunter’s capabilities. If you’re struggling, consider checking our Borderlands 4 Best Solo Class Guide to optimize your build, or use our Borderlands 4 Respec Guide to adjust your skills for better combat performance.

Phase 4: The Airship Chase Sequence

After defeating the Bio-Bulkhead, use the grapple points to race toward the airship. Here’s where the mission throws you a curveball – the airship will fly away no matter how fast you are. This isn’t a failure; it’s scripted!

What to do when the airship escapes:

Don’t panic – this is supposed to happen
Travel back to Outbounders HQ at the Launchpad
Help Rush fight off the Order troops attacking the base
Importante: Rush might get downed during combat. Revive him immediately if this happens

Phase 5: Final Airship Infiltration

With the Launchpad secure, you’re ready for the mission finale:

Return to the bunker area
Use your grapple hook to clear debris blocking the Fast Travel station
Head back to the surface
Enter the airship through the orange portal on the southeast side of the Launchpad

Inside the airship:

Look for a button that reveals three critical systems
Shoot all three critical systems (they’ll be highlighted)
Exit by jumping down from the central chamber

Mission reward: Completing One Fell Swoop unlocks the ability to open Order Bunkers throughout Kairos – a valuable endgame feature! Make sure to check out our detailed Order Bunkers Complete Guide to maximize your loot farming potential.

Pro Tips for Success

Guardar con frecuencia during this mission to avoid repeating sections if bugs occur
Stock up at vending machines before the Bio-Bulkhead fight – consider using Llaves de oro for better gear if you’re underleveled
Experiment with different Vault Hunters if you keep hitting the Zadra glitch
Join co-op if you’re struggling – other players can sometimes trigger dialogue when the host can’t

What’s Next After One Fell Swoop?

With One Fell Swoop completed, you’ve made significant progress in Borderlands 4’s main campaign. This mission opens up several new opportunities:

Beneficios inmediatos:

Access to Order Bunkers across Kairos for premium loot
Progression toward higher-level content and better rewards
New fast travel points for easier navigation

Recommended Next Steps:

Start farming Order Bunkers using our complete locations guide
Concentrarse en nivelación rápida to tackle upcoming challenges
Begin collecting Legendary Class Mods for endgame builds

This mission also sets up important story elements for the rest of your Borderlands 4 journey, so you’re well on your way to uncovering more of the game’s mysteries.

Official Resources & Community Support

Enlaces oficiales:

Essential Borderlands 4 Guides:

Remember, if you’re still stuck after trying these fixes, the community forums and official support channels are great resources. The Talk to Zadra bug is well-documented, so you’re definitely not alone in experiencing it. Keep these solutions handy – they work for most players facing this frustrating glitch!

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