20 Leagues Under the Sea

	Fallout 4 side quest 20 Leagues Under the Sea
	Technical Editor ID MS03 (indicated by resource naming, does not exist in files) Base ID N/A

 

	The following is based on Fallout 4 cut content and has not been confirmed by canon sources.

20 Leagues Under the Sea is a cut quest that was to appear in Fallout 4.

Behind the scenes

This quest's name is a cultural reference to the movie and book 20,000 Leagues Under the Sea.

Fallout 4 quests Main quests Sole Survivor main quests War Never Changes · Out of Time · Jewel of the Commonwealth · Unlikely Valentine · Getting a Clue · Reunions · Dangerous Minds · Shattered · The Glowing Sea · Hunter/Hunted · The Molecular Level · Institutionalized Institute main quests Institutionalized · Synth Retention · The Battle of Bunker Hill · Mankind - Redefined · Mass Fusion · Pinned · Powering Up · End of the Line · Airship Down · Nuclear Family Brotherhood of Steel main quests Reveille · Fire Support · Call to Arms · Semper Invicta · Shadow of Steel · Tour of Duty · Show No Mercy · From Within · Outside the Wire · Liberty Reprimed · Blind Betrayal · Tactical Thinking · Spoils of War · Ad Victoriam · The Nuclear Option (Brotherhood of Steel) · A New Dawn The Railroad main quests Road to Freedom · Tradecraft · Underground Undercover · Operation Ticonderoga · Precipice of War · Rockets' Red Glare · The Nuclear Option (Railroad) · Burning Cover The Minutemen main quests When Freedom Calls · Sanctuary · The Sight · Taking Independence · Old Guns · Inside Job · Form Ranks · Defend the Castle · The Nuclear Option (Minutemen) · With Our Powers Combined Side quests Miscellaneous side quests Benign Intervention · The Big Dig · Confidence Man · Curtain Call · The Disappearing Act · The Gilded Grasshopper · Here There Be Monsters ·Long Time Coming · Diamond City Blues · The Devil's Due · Emergent Behavior · Human Error · Kid in a Fridge · Last Voyage of the USS Constitution · Long Road Ahead · Pull the Plug · Special Delivery · Emogene Takes a Lover · The Secret of Cabot House · The Silver Shroud · Vault 81 · Hole in the Wall · Here, Kitty Kitty · Short Stories · The Marowski Heist Institute side quests Building a Better Crop · Plugging a Leak · A House Divided Brotherhood of Steel side quests The Lost Patrol · Duty or Dishonor · A Loose End · Getting Technical · Blood Bank · Reactor Coolant The Railroad side quests Boston After Dark · Memory Interrupted · Butcher's Bill Minutemen side quests The First Step · Raider Troubles · Abernathy Farm: Retribution Radiant quests Pest Control: (location) · Hypothesis · Appropriation · Reclamation: (location) · Political Leanings · Cleansing the Commonwealth · Quartermastery · Leading by Example · Learning Curve · Feeding the Troops · Jackpot: (location) · Concierge · Weathervane · Randolph Safehouse · Variable Removal: (location) · To the Mattresses · Lost Soul: (location) · A Clean Equation · High Ground · Kidnapping at (location) · (location): Greenskins · Clearing the Way for (location) · Taking Point · Ghoul Problem at (location) · Rogue Courser at (location) · Resettle Refugees at (location) · Defend the artillery at (location) · Stop the Raiding at (location) · Kidnapped Trader at (location) · Suspected Synth at (location) · Water, Food, or Power Freeform/Unmarked quests A New You · Art Appreciation · Botany Class · Brother Against Brother · The Cleaner · Familiar Faces · Fly Fishing · Gun Run · Hazardous Material · MacCready for Action · The Memory Den · Nuka Cola Needs · Order Up · Prep School · Public Knowledge · Recruiting Hancock · Tough Times · Traffic Jam · Trouble Brewin' · Wedding Day Add-on quests Automatron A New Threat → Headhunting → Mechanical Menace → Restoring Order → Rogue Robot Far Harbor Far From Home → Walk in the Park → Where You Belong → Best Left Forgotten → The Way Life Should Be → Cleansing the Land (Reformation) → Close to Home Living on the Edge: Blood Tide · Safe Passage · Hull Breach · Rite of Passage · The Hold Out · Turn Back the Fog · The Great Hunt Acadian Ideals: The Arrival · Hunting the Hunter · Data Recovery · The Price of Memory What Atom Requires: Visions in the Fog · The Heretic · The Trial of Brother Devin · Witch Hunt · Ablutions Workshop quests: Condensers Down  · Super Mutants in the Fog  · Trapper Attack  · Deadliest Catch Vault-Tec Workshop Vault-Tec Calling → Better Living Underground → A Model Citizen → Explore Vault 88 Power to the People → The Watering Hole → Vision of the Future → Lady Luck Nuka-World All Aboard → Taken for a Ride → An Ambitious Plan → The Grand Tour (Star Control  · High Noon at the Gulch  · Safari Adventure  · A World of Refreshment  · A Magical Kingdom) → Home Sweet Home (Claiming the Commonwealth) → Power Play (Cleaning House) Open Season Cappy in the Haystack · Precious Medals · Trip to the Stars A Goods Defense · A Permanent Solution · Amoral Combat · Collaring Outside the Lines · Taking Out the Trash · Under the Collar · Capture Settlement/Clear Out Settlement → Subdue Settlement/Shake Down Settlement Cut quests 20 Leagues Under the Sea · Bullet · Off the Grid · Salvage · That's the Spirit · The Enemy of My Enemy · The Replacement