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Xenoblade Chronicles X eGuide
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Contents

  • Changelog
    • Updates
  • Now Approaching Planet Mira
    • Foreword
    • See You in 40 Years
    • What Is Xenoblade Chronicles X?
    • Info for Veterans of Xenoblade Chronicles
  • A Primer for Prospective Citizens of Mira
    • Main Menu and Basic Functions
    • Who Are You?
    • Welcome to Blade
    • Seeing the World
    • Dressing the Part
    • Battle Meta
    • Combat Flow
    • Skells: Take It Up a Notch
  • The World of Mira
    • Introduction
    • New Los Angeles
    • Mira
  • Characters
    • The Player Character
      • The Player Character
      • Player Character Soul Voices
    • Party Members
      • Party Members
      • Alexa
      • Bozé Lowes
      • Celica
      • Doug
      • Elma
      • Frye
      • Gwin
      • H.B.
      • Hope Alanzi
      • Irina
      • L
      • Lao
      • Lin
      • Mia
      • Murderess
      • Nagi
      • Phog Christoph
      • Yelv
  • The Miran Unification Quest
    • The Miran Unification Quest
    • Prologue: Awakening
    • Chapter 1: New Los Angeles
    • Chapter 2: The New Frontier
    • Chapter 3: Builders of a Legacy
    • Chapter 4: The Ganglion Menace
    • Chapter 5: Ma-non Maneuvers
    • Chapter 6: Dark Matters
    • Chapter 7: Treachery
    • Chapter 8: The Gathering Storm
    • Chapter 9: Warriors of Wroth
    • Chapter 10: The Zu Pharg Menace
    • Chapter 11: Consequences
    • Chapter 12: Into the Core
    • Affinity Missions
      • Affinity Missions
      • A New Rival?
      • We Were Soldiers
      • Foggy Dilemma
      • The Repair Job
      • Meeting Yelv
      • Renewed Will
      • The Ties That Bind
      • A Day in the Life
      • Weaponized
      • A Friend in Need
      • Bottoms Up
      • The Mad Monk
      • Close Comrades
      • Nine Lives
      • Hope Springs Eternal
      • BFFs
      • My Dream
      • A False Hope
      • The Matchmaker
      • Arms and the Man
      • Spy Games
      • Bozé's Way
      • A Great Divide
      • Soldier of the Harriers
      • Nagis Time
      • The King of Fear
      • A Girls Wings
      • Blitzkrieg
      • Manhunt
      • Prospective Partners
      • What the Skell?!
      • Bozé's Ignorance
      • Climbing the Ladder
      • Ls Conundrum
      • The Little Rich Girl
      • Boot Camp
      • Reporting for Duty
      • A Challenger Approaches
      • A Present for Hope
      • New in New LA
      • Brotherly Love
      • Fitting In
      • Two Peas in a Pod
      • The Nopon Heir
      • Fathers and Sons
      • Rapid Misfire
      • Yelvs Partner
      • Lionhearted
      • To Serve Nopon
      • Mia Grows Up
      • Serial Thriller
      • Then and Now
    • Normal Missions
      • Normal and Basic Mission Index
      • Normal Missions
    • Basic Missions
      • Basic Missions
  • Data
    • Secret Files
      • Character-Yielding Missions At A Glance
      • Arms Manufacturer-Yielding Missions At A Glance
      • Exclusive Art-Yielding Missions At A Glance
      • Branching Missions
      • About Definian Downfall
      • Off The Record
      • The Skell License Exam
      • Rise of the Blood Lobster
      • Trade Agreement
    • Missions at a Glance
      • Story Missions
      • Affinity Missions
      • Normal Missions
      • Basic Missions: Bounty
      • Basic Missions: Gathering
      • Basic Missions: Social
    • Map Segment Contents
      • New Los Angeles
      • Primordia
      • Noctilum
      • Oblivia
      • Sylvalum
      • Cauldros
    • FrontierNav Connections and Data
      • Rare Resources
      • FrontierNav Site Data
    • Collectotopedia
      • Primordia
      • Noctilum
      • Oblivia
      • Sylvalum
      • Cauldros
    • Collectopedia Locations
      • Primordia
      • Noctilum
      • Oblivia
      • Sylvalum
      • Cauldros
    • Achievements
      • Story Achievements
      • World Achievements
      • Combat Achievements
    • Enemy Index
      • Enemy Categories
        • Theroids
        • Insectoids
        • Piscinoids
        • Humanoids
        • Mechanoids
        • Chmeroids
        • Ultrafauna
      • Enemies (Alphabetical)
        • A
        • B
        • C
        • D
        • E
        • F
        • G
        • H
        • I
        • J
        • K
        • L
        • M
        • N
        • O
        • P
        • Q
        • R
        • S
        • T
        • U
        • V
        • W
        • X
        • Y
        • Z
  • Social Functions
    • Overview
    • Squads
    • Scouting BLADEs
  • Shop Terminal Listings
    • Ground Gear: Weaponry
      • Assault Rifles
      • Longsword
      • Sniper Rifles
      • Javelins
      • Dual Guns
      • Dual Swords
      • Gatling Guns
      • Shields
      • Rayguns
      • Knives
      • Psycho Launchers
      • Photo Sabers
    • Ground Gear: Armor
      • Head Armor
      • Torso Armor
      • Left Arm
      • Right Arm
      • Leg Armor
    • Skell Gear: Armor
      • Head Armor
      • Torso Armor
      • Arm Armor
      • Leg Armor
    • Shop Terminal Listing
      • Skell Frames
    • Skell Gear: Weaponry
      • Sidearms
      • Back Weapons
      • Shoulder Weapons
      • Arm Weapons
      • Spare Weapons
  • AM Terminal Listings
    • Weapon Augments
      • Stat Increase
      • Weapon Customization
      • Critical Hits
      • Enemy Category
      • Attack Increase
      • Art Mods
      • Soul Voice
      • Special
    • AM Terminal Listings
      • Corporations
    • Skell Armor Augments
      • Stat Increase
      • Attribute Resistance
      • Debuff Resistance
      • Antidamage Measures
      • Special
      • Anticlimate Measures
    • Armor Augments
      • Stat Increase
      • Skell Enhancement
      • Attribute Resistance
      • Debuff Resistance
      • Antidamage Measures
      • Overdrive
      • Art Mods
      • Soul Voice
      • Special
      • Anticlimate Measures
    • Skell Weapon Augments
      • Stat Increase
      • Weapon Customization
      • Critical Hits
      • Enemy Category
      • Attack Increase
      • Art Mods
      • Special
    • Skell Frame Augments
      • Stat Increase
      • Fuel
      • Debuff Resistance
      • Attack Increase
      • Antidamage Measures
      • Overdrive
      • Special

Xenoblade Chronicles X Guide › Data › Secret Files

About Definian Downfall

“Definian Downfall” is a mission you must complete in order to get Mia as a party member. However, it’s behind quite a few mission chains, some of which won’t be completable until near endgame. We recommend completing Chapter 11 of the main story before looking these Normal Missions up:

Alex vs. Xenos:

Alien Nation

Shotgun Diplomacy

The Line of Fire

Alex’s Last Stand

Professor B:

Mystery Man

Professor B’s Return

The Definians:

Attack on Biahno Hills

Water Woes

The Miracle Maker

Rites of Ruin

Good Fortun

Definian Downfall

Branching Mission Outcomes

Mission NameResult AResult B

City Saviors

You defeated all of the little suids.

You decided to spare the little suids. “A Painful Lesson” mission unlocks later on.

The Celeste Three

You were ambushed by the Celeste Three, but emerged victorious. However, the safe requires a fourth key to open.

Fosdyke attacked you, but you emerged victorious.

However, the safe requires a fourth key to open.

A Proper Chopper

The helicopter made it back safely.

Roscoe thanked you for saving his men.

The helicopter crashed while returning, killing Howard.

Perhaps the repairs were faulty?

Alien Nation

You sided with Alex, electing to watch as he purged the alien threat to mankind’s future.

You stood against Alex, electing to protect New LA’s xenoform residents.

Lakeside Getaway

You succeeded in rescuing Ajoa from the indigens that attacked the Biahno Water-Purification Plant.

Indigens attacked the Biahno water-purification plant, killing the entire research team.

The Handy Ma-non

Task by task, you earned Sostenasa’s trust. It seems the BLADEs have benefited greatly from his services.

While you were unable to win Sostenasa’s trust, you at least feel closer to him than before.

Emotion Commotion

(Elemental Chunks Option)Dana’s love was requited. By observing the events, Chiopitus gained an understanding of human love.

(Red Thallus Antennae Option)Dana’s love remained one-sided. Was Chiopitus at least able to see the complexity of human love?

The Fashionista

The undergarment designs failed, but your knowledge of Ma-non tastes resulted in a wild new perfume.

The undergarment designs failed, but your knowledge of Ma-non tastes resulted in a refreshing new perfume.

Here Come the Brides

Nemard married a fierce Prone, pleasing Auld Belgazus. The entire Ma-non Ship will likely be festive.

Nemard married a kind Prone, pleasing AuldBelgazus.

The entire Ma-non ship will likely be festive.

Herbivores, Unite!

Speak to Yun’tonam before completing this quest and tell him not to eat the tree to trigger this option. With Mon’barac’s help, the Great Tree was restored to life. He and Naza also seem to have worked out their differences. This can be accomplished by talking to Yun’tonam before growing the second tree. He will then not eat the Great Tree.

This time, the reborn Great Tree was eaten by Yun’tonam. Divisions between the Prone and Orphe appear to run quite deep...

Forbidden Love

Love overcame the barriers between species, and Leroy and Lavina were married.

Leroy and Lavina were not able to marry, but it’s likely just a matter of time.

An Ancient Legend

Disaster has been averted. However, the large number of enemies resulted in casualties.

Disaster has been averted. Thanks to the help of the Cavern Clan, there were no casualties.

Training Day

Odsent’s retraining was successful.

It shouldn’t be long before Zarch realizes his dream.

The dangerous Odsent was defeated. It seems there will be no unnecessary conflict with the Cavern Clan.

My Angel, My Lana

You brought Lana home safely, though Bubu seems a little upset at her recklessness.

Lana has decided to live with Walolo, leaving Bubu sad and alone.

A Tip of the Cap

You helped make a Santa hat. Nosusu looks delighted!

You helped make a pom-pom beanie. Nosusu looks delighted!

Special Delivery

You never learned the package’s contents, but you delivered it to Bodada as instructed.

The package turned out to be fluffy—yet dangerous—pollen orbs. Now in Loma’s hands, they will not reach the general Nopon population.

Supplies Surprise

It feels like she’s using you, but you found Nalu’s requested goods regardless.

You planted a trap in the goods as per Lularita’s suggestion. It seems that Nalu is going to learn her lesson the hard way...

A Dish Served Cold

You stopped Zo Zazhi from getting killed and brought her back to New LA.

You stopped Zo Zazhi just in time and somehow managed to get her back to New LA.

Until the End

You successfully rescued Ge Jewhe.

Hopefully she will never again leave Vi Sezha’s side.

You could not rescue Ge Jewhe.

However, stories of her heroism are sure to become the stuff of legend.

Leaving the Nest

After gaining his freedom, De Ezich relocated to New LA.

De Ezich decided to straighten himself out under the stern eye of his parents.

The Queen Is Dead

You crushed the queen jacul alongside the Three Talons. Now the Wrothians have one less worry in their lives.

You crushed the queen jacul alongside the Three Talons. They suffered casualties, but now the Wrothians have one less worry in their lives.

The Unbreakable Sword

You recovered the unbreakable sword for De Zing.

No doubt he is off training with it right now.

You recovered the unbreakable sword for De Zing, who then gave you the blade in thanks.

Circle of Life

Kun’luarb passed, but new life was born via division, and senirapa water will bringmore.

Kun’luarb is no more, but a drop of senirapa water ensures that new life will beborn.

Pollution Solution

The hiring of the Zaruboggan helped prevent further damage, which made Liza’s day.

The new employee didn’t work out, but the Zaruboggan seem born for this kind of work.

Stop, Thief!

You found the stolen jewel and proved Shiraton’s innocence.

You doubted Shiraton’s innocence, but it turns out he was telling the truth all along.

The Old Gods

Golbogga, the god of the Zaruboggan and destroyer of Bedun, actually looks just like a... human?

Upon examining the disk, you found that not only does Golbogga exist, but he is also humanlike inform.

With his hypothesis destroyed, Toluera is in despair.

Definian Downfall

Fortun is dead, and the three Definian sisters dealt with.

Erio will finally be able to live in peace.

Fortun’s personality has changed, and the three sisters were defeated. Erio and her mother can now live in peace.

Rise of the Blood Lobster

You killed the Blood Lobster, who was actually Justin.

He died with a smile on his face.

You spared the Blood Lobster, who was actually Justin.

He wailed in despair at your mercy, as it spoiled his grand ending.

The Art of War

You defeated the leader of the Lotus Keep Building Site and routed the Ganglion, thus proving the validity of Sajif’s battle plan.

You defeated other enemies in the Lotus Keep building site besides the leader—thus failing to properly enact Sajif’s battle plan.

The Repair Job

The electrical fault was repaired. It’s a patch job, but it should hold for a littlewhile.

You fixed the electrical fault and replaced all the parts, leaving it better than you found it. Lin seems pleased.

The Mad Monk

You completed Bozé’s mission and rescued his former academy student. Go to BLADE Tower for the next affinity mission.

You completed the mission with Bozé and helped both the xenoform and Bozé’s former academy student.

Go to BLADE Tower for the next affinitymission.

Mayhem

May has learned the value of cooperation and returned to New LA ready to make friends.

May seems determined to continue with her solitary investigations of Oblivia.

Water Woes

It’s now safe for work to continue, and there were no issues during the tests—but Ajoa still seems worried.

There were no issues during the tests, but Ajoa still seems worried. Regardless, production can now be ramped up.

Frontier Spirit

You found the spring and also helped Bates out of a jam—which made quite the impression on Corwin.

It seems that Bates has run into a little trouble.

But his team will surely take care of its members’ problems.

Unknown Assailant

(Go West Option) Unfortunately, Corwin couldn’t be saved.

What will become of his team?

(Go South Option) You saved Corwin’s team. Their numbers have been depleted, but with Raleigh’s determination and the team’s frontier spirit, they’ll surely recover.

Murder Most Foul

You took down the killer, but unfortunately could not save Ackwar’slife.

You and Ackwar exposed Powell as the killer and defeated him. To do this you must have overheard the bomb disposal tip near the Restricted Hangar Entrance and attempt to defuse the bomb.

Shotgun Diplomacy

You succeeded in convincing Alex that his ways were in error, but his ally interfered.

You failed to convince Alex. Perhaps it’s simply impossible for him to see eye to eye with you...

Snipe Hunt

You eliminated the sniper. The Ma-non are no longer exposed to this Ganglion threat.

It cost you, but at least the Ma-non are no longer exposed to the Ganglion sniper threat.

The Party Line

The Ma-non candidate was taken care of, and a Nopon candidate chosen as the spokesperson instead.

Sun’barac announced hiscandidacy.

This looks good for xeno-human relations.

Tree-mendous

You rescued the captives with no casualties, and also caught a glimpse of the Tree Clan’s courage, for not a single one yielded to the Cavern Clan.

The chief’s son, Uzoma Vassago, battled to the end before finally dying with honor. It seems the Tree Clan’s hatred of the Cavern Clan is intensifying.

Kidnapped: Uzoma Vassago

Using Kepha Holly to save him, you successfully rescued the kidnapped Uzoma Vassago.

Uzoma Vassago refused to yield to the Cavern Clan, but perished at the hands of an indigen.

The Ultimate Price

During the mission, Team Gus was wiped out by indigens. Perhaps it was karma.

By helping Gus, you fell into his trap and could not complete the mission. Quincy, however, seems to have taken a liking to you.

Slovity’s Rampage

You defeated Megisia without injuring Slovity’s men.

You defeated Megisia, but couldn’t help killing Slovity’s men.

The Trading Floor

You collected the kiweggs requested by the Prone, but received no payment for your services.

The Prone demands were resolved by the sword.

You didn’t earn much for your trouble.

Sparking a Smile

The pep returned to Nan’s step after the fireworks.

Ngogo also looked delighted at not having to listen to Nan complain.

There was trouble along the way, but the fireworks display was a success, and Pisa found a new objective for her life.

Castle in the Sky

You obtained eyewitness reports, tracked down the thief, and returned the cargo. Kuta was delighted.

You encountered Bobora, whose account led you to the thief and the stolen cargo. Kuta was delighted.

The Big Bang

You gave the requested materials to Popote, thereby concluding the preparations. He will now head to New LA while Pisa makes the fireworks.

You gave the requested materials to Popote, thereby concluding the preparations. Pisa will now head to New LA while Popote makes the fireworks.

Lend an Ear

After much back and forth, Gu Ladha was appointed as a liaison to the humans.

Gu Ladha gained some confidence after the intense sparring match. No doubt she will make a fine soldier.

The Duel (Part IV)

You regained the sword. However, Gi Zang was injured by a surprise attack from an enemy imitating Tolba.

You defeated the enemy imitating Tolba Wolfen and regained the sword.

Lionhearted

You helped Ga Jiarg’s team destroy the Skells, gaining their respect in the process.

You destroyed more Skells than Ga Jiarg’s team, gaining their respect in the process.

My Dream

You submitted to the Murderess and wound up giving up both credit for the job and your reward. ...What a jerk.

You confronted the Murderess and had to beat back the attacks of her followers....What a jerk.

Bozé’s Ignorance

You repelled the xenoforms and defeated the indigen.

It seems there is little hope of Bozé’s xenophobia abating any time soon...

You repelled the xenoforms using a Ma-non device and defeated the indigen. Bozé seems to have opened his mind a little...

Weaponized

By choosing the stronger enemy, you helped Alexa test the Ramjet Rifle, and she gave you a prototype version in return. Go to the Outfitters Test Hangar for the next affinity mission.

You helped Alexa test the prototype weapon. Go to the Outfitters Test Hangar for the next affinity mission.

The Little Rich Girl

You won the bet with Yolanda and captured Lan’cord, thus completing your mission with the Murderess.

You lost the bet with Yolanda, but caught Lan’cord, thus completing your mission with the Murderess.

The Good Thief

Select Watch, Soothe, Disagree, and Wait to convince the thief to return the voltant.

The voltant was discarded into the reservoir, but thanks to Phoskeran, no permanent damage was done.

A Fateful Choice

Run’tonam and company were wipedout.

You informed On’tonam of Run’tonam’sd emise.

Run’tonam and company were wiped out.

You were able to bring her Ovah home.

A Dubious Operation

You reported Roselle’s crime to HQ and protected Shiraton.

You decided to look the other way when it came to Roselle’s plan to charge high prices for disposing of dangerous pollutants.

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