HALOGUN
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Nightmare’s gang as a family drabbles by Estel_dreamer
Fandom His Dark Materials - Philip Pullman, Undertale (Video Game)
- Mature, Teen And Up Audiences, General Audiences
- Creator Chose Not To Use Archive Warnings, No Archive Warnings Apply, Rape/Non-Con
- Other, Gen
- Series in Progress
21 Oct 2025
- Creator Chose Not To Use Archive Warnings
- No Archive Warnings Apply
- Rape/Non-Con
- Sans/Sans (Undertale)
- Kinda - Relationship
- Dreamtale Nightmare Sans (Undertale)
- Xtale Sans | Cross (Undertale)
- Error Sans (Undertale)
- _____tale Sans | Ink Being a Jerk (Undertale)
- What-If
- XTale Sans | Cross Needs a Hug (Undertale)
- Cross only speaks Spanish
- Español | Spanish
- Error also speaks spanish
- cause he watches Undernovela
- Caring Dreamtale Nightmare Sans (Undertale)
- Parental Dreamtale Nightmare Sans (Undertale)
- Past Abuse
- Ink wasn’t very nice to Cross
- Dreamtale Sans | Dream (Undertale)
- Killer Sans (Undertale)
- Dusttale Sans (Undertale)
- Horrortale Sans (Undertale)
- Geno and Reaper mentioned
- Crack Treated Seriously
- Fluff and Humor
- Minor Injuries
- Misunderstandings
- dadmare
- Mama Error
- youngest sibling Cross
- Dust will commit murder for his youngest brother
- Error will commit murder for his youngest child
- Uncle dream
- Bad Sanses | Nightmare's Gang (Undertale)
- bad sanses as a family
- Found Family
- Dream is trying his best
- Nightmare is a history nerd
- Nightmare and Error are platonic life partners
- and they have four dumb kids between them
- _____tale Sans | Ink (Undertale)
- Underswap Sans (Undertale)
- Protective Error Sans (Undertale)
- don’t mess with Error’s kid
- Error will commit war crimes for his favourite kid
- Ice Cream
- Killer Is A Little Shit
- he definitely has middle child energy
- Poor XTale Sans | Cross (Undertale)
- he just wants a nice family outing
- Error to the rescue
- Error speaks spanish
- Family Fluff
- Domestic Fluff
- Christmas
- Killer loves Christmas
- he goes all out
- XGaster’s A+ parenting
- he was a prick
- Baby’s First Christmas
- Mama Error loves his youngest child
- Gingerbread Houses
- Cross is neurodivergent in this
- nothing outright is said but he’s experiencing sensory issues
- issues I myself have
- Food Issues
- Food Anxiety
- Horror is a good big brother
- character unable to eat
- Implied/Referenced Child Abuse
- implied child neglect
- he’s such an ass
- Worried Horror
- Worried Killer
- worried dust
- everyone is worried
- ARFID - Avoidant Restrictive Food Intake Disorder
- Dust is a good brother
- he misses being a big brother
- eldest sibling Horror
- middle children Dust and Killer
- Dust took one look at Cross and went mine
- Brotherly Love
- Sibling Bonding
- Team as Family
- Nightmare out here collecting traumatised children
- Hurt/Comfort
- Working Through Grief
- Surprisingly good coping skills
- Dust knows how to help a traumatised oreo
- Brotherly Bonding
- Killer is a good brother
- Dissociation
- Cross Speaks Spanish
- Killer speaks Arabic
- عربي | Arabic
- Lullabies
- Killer can sing
- He cares so much about his family
- Self-Harm
- but unintentional
- Cross doesn’t realise what he’s doing
- Killer To The Rescue
- He’s a little shit but he knows when to tone it down
- Pets
- The gang all have pets
- Killer has a cat
- Dust has rats
- Horror has chickens
- Nightmare has fish
- Error has a pet rock named Dirt
- Cross gets a pet
- that man is a menace
- Nightmare and Error will hunt him down for hurting their baby
- Justice for Henry the snail
- Killer being a little shit
- Pranks
- mild bullying
- Killer takes things a little far
- Cross is caught in the crossfire
- Improper use of a microwave
- Killer regrets his decisions
- Killer is a good big brother
- Dream is a good uncle
- Poor Dreamtale Sans (Undertale)
- He's trying to be a good Uncle but Killer ain't helping
- they get there eventually
- Nightmare is suspicious
- Brief mentions of medical conditions
- Cross is implied to be neurodivergent
- XTale Chara (Undertale)
- XTale Papyrus (Undertale)
- Xtale Undyne (Undertale)
- Protective Dreamtale Nightmare Sans (Undertale)
- Past Child Abuse
- Kidnapping
- Physical Abuse
- X-Tale wasn’t a nice place
- XTale W.D. Gaster
- if he wasn’t already dead he’d be rotting in jail
- XGaster is dead but his ideals and beliefs live on
- XPapyrus is not a good brother
- Xtale Chara is a good brother
- Xtale Frisk mentioned
- He’s also a good brother
- Mentions of Medical Issues
- magical dampening collar
- Seizures
- Vomiting
- Rescue
- XChara to the rescue
- Caring Error
- they both love their children so much
- he shows up for like a paragraph and doesn’t have dialog
- mentioned uncle squad
- First Meetings
- God Of Destruction Error
- God of Negativity Nightmare
- Developing Relationship
- Asexuality
- Aromantic
- Platonic Life Partners
- they are married but purely for tax benefits
- they do love each other
- just not in a romantic way
- Error stalks Nightmare for a bit
- He’s just curious
- and doesn’t know how to friendship
- Male Friendship
- Mentioned Ink
- Mentioned Destructive Negative kids
- aka murder trio plus Cross
- I need a better name for them
- Sciencetale Sans (Undertale - Sciencetale by HolyTraitor)
- Medical Conditions
- Absent seizures
- head injuries
- Soul conditions
- Intermittent Explosive Disorder
- ARFID
- Autism
- ADHD
- hypermobility
- Killer’s messed up soul causes him issues
- so does the liquid determination dripping from his eyes
- Horror’s head injury has lasting affects
- Dust has anger issues
- Cross is neurodivergent
- cause you know
- XGaster - Freeform
- Nightmare is a good dad though
- He will make sure all his boys are safe and happy
- Mentioned Nightmare
- mentioned Killer and Horror
- Dust is going through it
- Grief/Mourning
- Guilt
- IED
- Mental Health Issues
- Dust struggles with feelings of grief and guilt
- Unhealthy Coping Mechanisms
- Cross to the rescue though
- he not about to let his new brother suffer alone
- Implied/Referenced Suicide
- mentioned XFrisk and XChara
- Cross and XFrisk and XChara were siblings
- XGaster was a terrible parent
- not just to Cross
- Dust Needs a Hug
- brotherly bonding between Dust and Cross
- Complex Grief
- grief doesn’t just go away
- it stays with you for years
- Swearing
- Nightmare doesn't like swearing
- Cross is a good brother
- Angry Cross
- Angry Dust
- They're both just worried for the other
- Code Words
- mentioned medical issues
- Killer’s eyes are messed up cause of the determination
- Dust has IED
- Cross has hypermobility
- Horror has seizures
- Poor Horrortale Sans (Undertale)
- Sweetheart Horrortale Sans (Undertale)
- Protective Dust
- Nightmare doesn’t like swearing
- Missions Gone Wrong
- Error shows up for like two lines
- implied neurodivergent Cross
- he goes nonverbal
- Horrortale Sans needs a hug
- blue is a sweetheart
- he’ll still kick your ass though
- medical episode
- Horror is going through it
- his family have his back though
- XTale Frisk (Undertale)
- Mentioned Error
- Mentioned Killer - Freeform
- Uncle Dreamtale Dream Sans
- Don’t trust Ink with anything
- especially looking after kids
- Stressed Dream
- Omega Timeline
- Xtale Frisk and Xtale Chara are brothers
- Xtale Frisk and XTale Chara and Cross are brothers
- Family Reunion
- Cross is having a great time catching up with his brothers
- Dream is having a bad time
- He wants to throw Ink out a window
- it’s all Ink’s fault
- Ink’s shitty memory
- Spanish Speaking Cross
- Something New Sans | Killer (Undertale)
- Underfell Sans (Undertale)
- Underfell Papyrus (Undertale)
- Alternate Universe - Daemons
- Unconventional Daemons
- Healing
- Chara and Cross are siblings
- XGaster wasn’t a good parent
- Sharing a soul
- Sharing daemons
- Non-Consensual Body Modification
- Past Trauma
- Horror’s eye
- Horrortale Undyne is mean
- they are brothers your honour
- murder time trio as siblings
- plus cross towards the end
- Antheia is a sweetheart
- She looks after Horror
- poor dust
- Character Study
- Character Death
- Papyrus still believes in his brother
- Dust didn’t want to do what he did
- Eira is great
- she loves Dust so much
- they are a family
- i will die on this hill
- Anxiety Disorder
- Neurodivergent Cross
- autistic cross
- Stimming
- Cause XGaster
- That man be haunting the narrative
- He’s a stressed out boy
- Stress Cleaning
- People Pleasing
- Nonverbal Cross
- Selective Mutism
- These two love their kids so much
- Good brothers Horror Killer and Dust
- They look out for their oreo
- Ghost Chara (Undertale)
- Fran loves Killer
- they just have a complicated relationship
- It Gets Better
- Killers Chara was mean
- XTale Chara is a bro though
- Fran is suspicious
- but she already loves Cross
- Implied/Referenced Rape/Non-con
- Nothing is explicitly stated or shown
- But please read with cautions
- Underage Rape/Non-con
- Forced Marriage
- XFrisk XChara and XAsriel are the only real ones from X-Tale
- The rest of X-Tale is messed up
- they are out for blood
- Murder
- Poisoning
- Arson
- Cross knows multiple ways to kill someone and make it look like an accident
- Brief appearance of Passive Nightmare
- Undercover
- Xtale Sans | Cross Speaks Spanish (Undertale)
- Error Sans Speaks Spanish (Undertale)
Summary
This will be a bunch of one shorts or short stories about Nightmare and his gang being a family. Most will probably be Cross centric cause he’s my absolute favourite. There will be fluff, angst, humour, heartache and much more
Most of these won't necessarily be connected but if they are I'll be sure to specify which ones are
- Words:
- 58,947
- Works:
- 21
- Bookmarks:
- 86
Bookmarked by HALOGUN
11 Oct 2025