Fan fiction in the Science Fiction genre. Fics are listed alphabetically within their sections.
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Animorphs fics
Babylon 5 fics
- The Babylon Project (fan-made Freeware Game using the FreeSpace 2 engine)
Battlestar Galactica fics
Code Geass fics
- Blank Slate
- The Castaway Prince
- Changing Course
- The Charlatans of Circumstance
- Code Geass: Age of the Chaotic Truth
- Code Geass: Alden of the Uprising
- Code Geass: Awesome of the Rebellion
- Code Geass: Colorless Memories
- Code Geass: Rai of the Revolution
- Ice And Fire
- Code Geass: A Different Code
- Code Geass: Dirge of Daedalus
- Code Geass Funnies
- Code Geass: The Game of Kings
- Code Geass: The Iron Prince
- Code Geass: Lelouch of the Awesomeness
- Code Geass: Lelouch of the Second Chance
- Code Geass: Light in the Darkness
- Code Geass: Rebillion On the Other Side
- Code Geass: Lelouch of the Redemption
- Code Geass Reverse
- Code Geass Tertio Bello
- Code Geass: Timeless Imprisonment
- Code Geese: Lucia of the Redecoration
- Darkest Savior
- Death Wish
- Decayed
- The Demon King
- The Dragon The Protected The Rose Garden
- The First Servant
- The Fool Ascendant
- For Two
- Forever, With You
- From The Ashes
- The Ghost In the Machine
- A Golden Meridian
- Higanbana
- I Heard The World
- Ignore The Comedians
- In The End
- Jurassic Geass: A Code Geass Crack Fic with mutant dinosaurs.
- Kallen Stadtfeld, Countess of Britannia
- Lelouch of the Revolution
- Memories of the Rebellion
- Metronome
- More Than Just A Man
- My Mirror, Sword, and Shield
- My Queen
- Now Comes The Night
- Of Monsters and Men
- Other Side of the Revolving Door
- Passion
- Pizza Delivery Is Serious Business
- A Pizza Hut Ending
- The Power of Gods
- Remix of Your Gods
- Resilience
- Revenant
DC Universe fics
- Adventures of a Super Family: A Superman story.
- Course Corrections: An Alternate Universe story.
- A Force of Four: A Power Girl story.
- Dance with the Demons: A Batman fanfic.
- Daughter of Fire and Steel: A Superman story.
- The Day After You Saved the Multiverse: A Superman story.
- Funeral for a Flash: A The Flash fanfiction.
- The Golden Boy's Last Temptation: A Supergirl fanfic.
- Hellsister Trilogy: A Supergirl fanfic.
- Here There Be Monsters: A Shazam! fanfiction.
- Inviolate: A Superman story.
- Kara of Rokyn: A Supergirl fanfic.
- The Metropolitan Man: A Superman story.
- New Beginnings (Smallville): A Superman story.
- Silver Girls
- Superman and Man: A Superman story.
- Superman of 2499: The Great Confrontation: A Superman fic set in the far future.
- Super Villain Prevention 101: A DC Super Hero Girls fanfiction.
- Survivors (SpeedForce 1229): A Supergirl (2015) story.
- To Hell and Back (Arrowverse): An Arrowverse fanfic.
- Ultimate DCU Headverse
- The Unfantastic Adventures of Bizarro No. 1: A Superman story.
- A Very Kara Christmas: A Superman story.
- With this Ring... (Green Lantern): A Green Lantern fanfic.
Doctor Who fics
- The Children of Gallifrey
- A Different World
- A Discourse on the Medical Risks of Regeneration
- The Doctors' Mission Statement
- The Effect of Dimensional Transcendence on Mozzarella Cheese
- The End Of the Universe
- Five Times Lord Braxiatel Had Occasion to Regret The Doctor's Exile Very Deeply Indeed
- Flowers on Fire
- The Forgotten
- From This Day To The Ending Of The World
- Frozen Hearts
- The Game
- Holding the Moment
- Hush, Says the Scone
- In This World You Cannot Change
- Invisible Road
- It Will Come For Your Children
- A Kinder Cartography
- Le Donne Che Piangono (The Weeping Women)
- The Moment Has Been Prepared For
- More Than an Echo
- The Naming Of Things
- The New Three Doctors
Dragon Ball fics
Eclipse Phase fics
Firefly / Serenity fics
Futurama fics
Halo fics
Heroes fics
Invader Zim fics
Marvel Universe fics
- Almost No One Makes It Out: A Iron Man Films fanfic.
- Books and Backchat: Iron Man Films fanfic.
- Change Is Gonna Come: Iron Man Films fanfic.
- Concession: Iron Man Films fanfic.
- The Darwin Chronicles: A X-Men fanfic.
- Devil's Diary: A X-Men fanfic.
- FIRE! (DarkMark): A Marvel Universe fanfic.
- Firefighter: Iron Man Films fanfic.
- Hazard Pay: Iron Man Films fanfic.
- Hearts and Souls: Iron Man Films fanfic.
- Help Me: Iron Man Films fanfic.
- The Kids Aren't All Right: Iron Man Films fanfic.
- House of Summers: A X-Men fanfiction.
- The Legend of El Diablo: Iron Man Films fanfic.
- Post Traumatic Stress Disorder: Iron Man Films fanfic.
- A Prize for Three Empires: A Carol Danvers fanfic.
- Some Things Shouldn't Be a Chore: The Avengers (2012) fanfic.
- Squirrelly Business: Iron Man Films fanfic.
- The Toasterverse: The Avengers (2012) fanfics.
- Ultimate Sleepwalker: A Marvel Universe fanfic about mind-hopping aliens.
- An Uncanny Likeness: Iron Man Films fanfic.
- The Value of Strength: The Avengers (2012) fanfic.
- What Happened To The Burd? Iron Man Films fanfic.
- X-Men 1970: A X-Men fanfic.
- X-Men: The Early Years: A X-Men fanfic.
- Your Fixed Point: Iron Man Films fanfic.
Mass Effect fics
- 100 Things Commander Shepard's Crew Will Mutiny Over
- Accidental Hero of the Galaxy
- Aftermath
- Aliens Are Weird
- And the Meek Shall Inherit The Galaxy
- Black Moon Rising
- Broken Wings
- Cause and Effect
- Clearly a Mistake
- Cultural Differences
- Destroyed
- The Distress Call
- An Elegant Solution
- Engineered
- Escaping the Past
- Exitus
- Fight For The Lost
- The Final Problem
- First Contact
- For Such Loss, Abundant Recompense
- Forfeit
- The Fourth Option
- Friends Like These
- From Hell's Heart
- From The Stars We Come
- The Future That I See
- Gabby and Ken
- The Galaxy Needs Heroes
- Geth Infiltrator
- Graveyard Shift
- GT Snap Shots
- Harvest
- The Homefront
- In Times Of War
- Infiltrait0r N7
- Iron Shapes Iron
- Joker's List
- Just a Soldier
- Kingdom of Rust
- KOKOMO
- Layin' Down The Law
- Learning Experiences
- Legacy of the Shadow Broker
- The Long Walk
- Lunctio
- Manipulations
- Marauder Shields
- Mass Effect: Circular
- Mass Effect: Conception
- Mass Effect: Grunt Sticks It In
- Mass Effect: Iron Rebirth
- Mass Effect: Mistakes Worth Sharing
- Mass Effect: Newton's First Law
- Mass Effect: Order Upon Chaos
- Modus Operandi
- Noir Tali Is Noir
- Nothing Ventured, Nothing Gained
- Our Love Is Problematic
- The Parting Glass
- Persephone Rising
- Progress Reimagined
The Matrix fics
My Little Pony Friendship Is Magic fics
Neon Genesis Evangelion fics
- A Crown of Stars: A Neon Genesis Evangelion story with alternate dimensions, timetravel, space-ships...
- Advice and Trust: An Alternate Universe Fic
- Asuka & Shinji's Infinite Playlist
- The Child of Love: A fic with Humongous Mecha, Eldritch Abominations and genetic experimentation to create a Super-Soldier with Psychic Powers.
- Doing It Right This Time: A Peggy Sue Evangelion fanfic.
- EVA Sessions: Someplace Vast and Dry: An Alternate Universe fanfic retelling, with saner characters and political intrigue.
- Evangelion 303: An Alternate Universe comic with a helping of warfare tropes.
- Ghosts of Evangelion: A post-Apocalypse fic.
- A Glass of Wine
- The Gospel Of Malachel: An Alternate Universe story.
- HERZ: A fanfic set in the future.
- Higher Learning: Another Peggy Sue fanfic.
- I don't want to forget
- Neon Genesis Evangelion: Genocide: A Continuation story.
- NGE Mitigation
- Nobody Dies
- The Rebuild of Nobody Dies, a rewrite of the above.
- Once More With Feeling (Crazy-88): A Peggy Sue story.
- The One I Love Is...: Another Alternate Universe Fic.
- Orchestrating the Silence
- Read the Fine Print (Evangelion)
- RE-TAKE: A doujinshi Continuation featuring time-travel and alternate universes.
- Rise of the Minisukas
- Samsara: A time-loop story.
- Scar Tissue: A Continuation story.
- The Second Try: A fic combining After the End survival and Peggy Sue time travel.
- Walking in the Shadow of Dreams: Another Alternate Universe story.
- You Are (Not) At Fault
Stargate fics
- Aftershocks
- Altered Destiny: Divergence Point
- Another Way
- As According To Plan
- Asura Path
- The Barista
- Bell Curve, or, Ladies' Night At the Boom Boom Room
- Census 2000
- City on the Edge of Forever: Pilot
- A Farm In Iowa
- Flight of the Orion
- Flyboy
- Four Blatant Lies About Atlantis (And One That's Totally True)
- Freedom's Just Another Word For Nothing Left To Lose
- The Glory of Their Days
- The Hard Prayer
- Hero For A New Age
- In the Moonlight
- L'Ombre du Passé/The Shadow of the Past
- Learning Tilt (The Spatial Orientation Remix)
- A Pond With No Fish
- The Puddlejumper Diaries
- The Ratio Of Burning
- Rebuilding Babel
- The Remnant
- Retrograde
- Rubber Sword
Star Trek fics
- A 62-Day Study of the Human Grieving Process
- Aen'rhien Vailiuri (Star Trek Online)
- Amor Delirius
- And All The King's Men
- And They Won't Believe You When You Write Home About It
- As Sparks Fly Upward
- Atlas
- Bait and Switch (STO) (Star Trek Online)
- Beat the Drums of War (Star Trek Online)
- The Best of Both Girls
- Bitter Glass
- The Brave Little Tailor in the Pale Moonlight
- Break
- Called You Friend
- Collateral Damage
- Comforting Each Other With Apples
- Communication
- Deep Water
- Denouement
- Diamonds, a Club and a Couple of Hearts
- Differential
- Discount Shot Night
- Diving
- Doctor-Patient Privilege
- Dolce Et Decorum Est
- Don't Stop Believing
- Down and Out and Under the Table
- Dreams and Reality
- Dream Until Your Dream Comes True
- Elysium
- Emael Mosekhesailho
- Enterprise Squared
- Establishing Rapport
- Fighting Gravity
- The Finest In The Fleet
- Five and a Half People James T. Kirk Never Succeeded In Seducing
- "Flaihhsam s'Spahkh"
- Fortune's Favoured Child
- Freedom Is Standing in the Light
- From Bajor to the Black
- "Frostbite"
- The Game
- Graduate Vulcan for Fun and Profit
- Grischa
- Heart To Heart
- The Headhunt (Star Trek Online)
- "Heis'he Ri'nanovai" (Star Trek Online)
- Hesitation
- Home
- Home
- How to Avoid Kicking Puppies and Other Valuable Lessons in Leadership
- How Many Roads? or, 27 Times Jim Kirk Hit On Nyota Uhura
- If Wishes Were Horses
- Incident Report
- Innocent When You Dream
- Insert Slash Here: A Collection of Oneshots
- Internment Camp 317
- It's All In The Delivery
- Keep Your Clothes On!
- "Last Rights"
- Leave No Soul Behind
- Legacy of ch'Rihan (Star Trek Online)
- Letter To The Manufacturer
- Letters From the Northern Continent
- Lost and Found
- Love Is Strange
- Magpie
- Mixed Feelings
- The Most Precious Thing
- Murphy's Law of Jim Kirk Diplomacy
- The Mysterious Case of Neelix's Lungs
- The Native
- Not All Those Who Wander
- Observations
- Of Two Worlds
- Oh Two Hundred
- Ordinary Extraordinary Life
- Perspectives
- Peace Forged in Fire
- The Quirks of Jim Kirk
- Reality Is Fluid
- Redshirt
- Red Fire, Red Planet
- Reimagined Enterprise
- Rekindling Fire
- Revisionist History
- Sacrifice
- Save Me
- Secret Vulcan Mating Rituals
- Sensate Focus
- "Shakedown Shenanigans"
- Shine Like The Sun
- So Wise We Grow
- "Solaere ssiun Hnaifv'daenn"
- Spoof Trek: Frogger
- Stained
- Standardized
- Star Trek: Endeavour
- Star Trek: Enterprise, The Open Door
- Star Trek: Foundations
- Star Trek: Warship Voyager
- Strange Times Are Upon Us
- Strive Seek Find Yield
- Subtracting The Stars.
- Switch
- Symphony For Stars and Planets
- Take Refuge In What You Know
- That Was A Good Fight
- A Therapeutic Relationship
- The Thin Man Beams Aboard
- Things of Which We Do Not Speak
- Things that Never Happened I: Blue
- TNG Season 8
- "To Absent Friends"
- Trinity
- TwitterEnterprise
- Two Sides of a Coin
- Unbeaten
- The Unforgotten
- The Universe Doesn't Cheat (Star Trek Online)
- Until It Sleeps
- Untitled
- Veritas
- Village!Verse Series
- A Voice in the Wilderness (Star Trek Online)
- Voyager Virtual Season 7.5
- Voyager Virtual Seasons 8 and 9
- The War of the Masters (Star Trek Online)
- Watch The World Burn
- The Waterpark 'Verse
- What Friends Are For
- What I Am To You
- What Lies Within
- Whatever A Moon Has Always Meant
- When the Game Ends, We'll Sing Again
- When The Lights Go On Again
- The Word Withheld
- The Wrong Reflection (Star Trek Online)
Star Wars fics
- Blood and Honor: A Star Wars fanfic.
- Coruscant Noir: A Star Wars fanfic.
- A Destiny Altered
- Discovery (Marvelouswrites)
- Falling: The Fate of Ahsoka Tano: A Star Wars fanfic.
- Jedi Padme Trilogy: Star Wars fanfics.
- Jedi of the Future Trilogy
- On the Edge of the Devil's Backbone: Star Wars fanfic.
- Ouroboros: Star Wars fanfic series.
- Shadows of the Future: A Peggy Sue fic.
- Sith Academy: a shared Star Wars fanverse.
- The Sith Resurgence: a Star Wars Sequel Trilogy fanfic
- Star Wars: Ascendancy: A Star Wars Rebels Continuation Fic.
- Star Wars Paranormalities Trilogy: Star Wars fanfics.
- Tarkin's Fist
- The Unabridged Memoirs of Darth Plagueis the Wise: Star Wars fanfic.
Torchwood fics
- The Adventures of Jaunty Jones
- And Seven For A Secret
- Countdown to Oblivion
- The Day I Stopped Dreaming
- Everything That Rises Must Converge
- Game, Sutekh, and Match
- Get Loved, Make More, Try To Stay Alive
- Intersecting Geodesics
- Proof Of Your Existence
- Resonating Throughout Time
- Second City Torchwood:
- Second Star to the Right:
- Shades Of Ianto
- The Theory of Two Centres
- A Tree Grows in Cardiff
- What's Wrong With the Captain?
- The Windhovers
Crossovers
- Administrative Mishap: Supergirl (2015) and Worm Crossover.
- Adventures of a Line Hopper: Doctor Who and Buffy the Vampire Slayer Crossover.
- Apostle's Message Redux: Mass Effect, Stargate SG-1 Crossover.
- Archangel Ascendant: Batman, Mass Effect Crossover.
- Avatar: Bender's Tale: An Avatar: The Last Airbender and Futurama Crossover.
- Avatar of Victory: Avatar: The Last Airbender, Mass Effect Crossover.
- The Babylon Effect: Babylon 5, Mass Effect Crossover.
- Back to the Doctor: A Back to the Future and Doctor Who Crossover.
- Between Minds: Portal and Half-Life.
- Biomass Effect: Mass Effect and [PROTOTYPE] Crossover.
- Tavi's Blood And Fire: Halo, Mass Effect Crossover.
- The Bridge (MLP) (Sailor Moon, Godzilla, Gamera, Pacific Rim, My Little Pony: Friendship Is Magic, and various other franchises)
- Bridges: Buffy the Vampire Slayer and Stargate SG-1 Crossover.
- Browncoat, Green Eyes: Firefly and Harry Potter Crossover.
- Chains of the Kindred: A Halo and Warhammer 40,000 Crossover.
- The Chess Match: Code Geass and Death Note Crossover
- Chronicles of the Crusade: A Babylon 5 and Stargate SG-1 Crossover.
- Chronicles of the MPA: the World's Heart: A Ōkami and Spyro the Dragon Crossover about protecting the multiverse.
- The Clinton Street Car Crash: A Doctor Who and Smallville Crossover.
- Code Geass 50K: Lelouch of the Imperium
- The Doctor's Doctor (Doctor Who, Sherlock and Sherlock Holmes)
- Code Geass: Kamina of the Revolution: (Code Geass, Gurren Lagan)
- Come Along: Death Note and The Sandman (1989) Crossover, Speculative Fiction.
- Consequences of Actions: A Babylon 5 and Stargate SG-1 Crossover.
- Consuming Direct Control: Mass Effect, Prototype Crossover.
- Convergence a Halo and Mass Effect Crossover.
- Crumpets Aren't My Style: Harry Potter and Stargate SG-1 Crossover.
- CyberTech: War of the Worlds: Harry Potter and Marvel Universe Crossover.
- The Dalek Invasion of Hetalia: Hetalia: Axis Powers and Doctor Who Crossover.
- A Dalek Latern: Doctor Who and Green Lantern Crossover.
- Damage Control : Doctor Who and Torchwood Crossover.
- Dead Note: Deadpool and Death Note Crossover. Mutants, powers, and cyborgs.
- The Death Note Discovery: Death Note, Torchwood Crossover. Investigating a non-terrestrial lifeform.
- Degrees of Seperation: Mass Effect and Stargate SG-1 Crossover.
- Destination, Darkness: Massive Multiplayer Crossover with Buffy the Vampire Slayer, Thor, Transformers Film Series, Green Lantern (2011), and Fullmetal Alchemist.
- Destiny: Gospel of a New Genesis (Neon Genesis Evangelion, Destiny)
- Displaced (TheMountainJew) (Spider-Man, Batman)
- Doctor Who/Slenderman Crossover
- The Doctor's Faith Healing: Angel and Doctor Who Crossover.
- Don't Be: Buffy the Vampire Slayer and Doctor Who Crossover.
- Drift: Mass Effect, Terminator: The Sarah Connor Chronicles
- Dust of the Stars: A Battlestar Galactica (2003) and Stargate SG-1 Crossover.
- Eagle's Fall: a Command & Conquer, Mass Effect Crossover.
- Echoes of Yesterday: A Worm and Supergirl crosover.
- Endurance: A Doctor Who and Torchwood Crossover.
- The Enterprise Strikes Back: (Star Trek: Enterprise, Star Wars)
- Eternal Geass Moon: The Garden of Sinners: (Code Geass, Kara no Kyoukai)
- Exodus of Stars: BattleTech, Mass Effect
- Fate: Nightmare Apatheia: (Code Geass, Fate/Stay Night)
- FateGeass: The Eden Vital War: (Code Geass, Fate/Stay Night)
- Ferris: An XCOM: Enemy Unknown and Iron Man Films Crossover.
- Finding Home: The Avengers (2012) and Harry Potter fanfic.
- The First Movement of the Odyssey - Redux: Halo and Stargate SG-1 Crossover.
- First Time: A Dexter and Heroes Crossover.
- For Captain and Cardiff: Doctor Who and Torchwood Crossover.
- Forever Janette: A Doctor Who and Forever Knight Crossover.
- Friends of a Solar Empire: My Little Pony: Friendship Is Magic and Sins of a Solar Empire Crossover.
- From The Ashes: Fallout, Mass Effect
- From Prometheus To 12: Battlestar Galactica (2003), Death Note Crossover. Mind Screw Space Opera with Cyberpunk and Speculative Fiction elements.
- Galton's Children: A Code Geass and Elfen Lied Crossover.
- Garfield Effect: Galaxy Adventure: Garfield, Mass Effect
- Geass Rider Zero Knight: (Code Geass, Kamen Rider)
- God of Death: Warhammer 40,000 and World of Warcraft Crossover.
- Going Native: A Battlestar Galactica (2003) and Star Trek: The Next Generation Crossover.
- Hail to the King (Thuktun Flishithy): Neon Genesis Evangelion and Godzilla Crossover
- Harry Potter and the Ascension of Ra: Harry Potter and Smallville Crossover.
- Harry Potter and the Digimon Frontier: Digimon Frontier, Harry Potter Crossover.
- Harry Potter and the Invincible TechnoMage: Harry Potter, Iron Man Crossover with Sufficiently Analyzed Magic.
- Harry Potter and the Power of the Dark Side Harry Potter and Star Wars Crossover which has Space Opera elements with Sufficiently Analyzed Magic.
- Hight of Power: Code Geass, Death Note, Mobile Suit Gundam 00 Crossover.
- Hogwarts Rejection Letters: Harry Potter Massive Multiplayer Crossover with many other Sci-fi and Fantasy canons.
- Hogwarts Rejection Letters Chapter 6 is a Harry Potter and Star Wars Crossover.
- Intelligence Factor: Pokémon and Star Trek: Deep Space Nine
- Iron Hearts: A My Little Pony: Friendship Is Magic and Warhammer 40,000 Crossover.
- In Between and All Over Again: A Doctor Who and Torchwood Crossover.
- In Death's Shadow: Death Note and Neon Genesis Evangelion Crossover.
- In the Midst of Liars: A The Avengers (2012) and Doctor Who Crossover.
- In the Shadow of the Gods: A Halo and Mass Effect Crossover.
- Intergalactic No Fault Collisions (crossover of Star Wars and Worm)
- Jaded Golden Threads: Massive Multiplayer Crossover.
- Journey's Dawn: A Doctor Who and Young Wizards Crossover.
- Jupiter Brains All Over The Walls: A Battlestar Galactica (2003) and Mass Effect Crossover.
- Just Impediment: Blackadder and Doctor Who Crossover.
- JUSTICE: Code Geass Massive Multiplayer Crossover
- The Justice League Of Cardiff Is A Stupid Name: A The DCU and Torchwood Crossover.
- Killer: Death Note, Eclipse Phase Crossover.
- Lantern Prime Transformers and Green Lantern
- Last Child of Krypton: Neon Genesis Evangelion and Superman crossover.
- The Last Daughter: Superman and Worm crossover.
- The Last Spartan: A Halo and Mass Effect Crossover.
- The League of Interdimensional Heroes: Massive Multiplayer Crossover with Artemis Fowl, My Little Pony: Friendship Is Magic, Spider-Man, Teenage Mutant Ninja Turtles (2003), Kung Fu Panda, Sonic X, and Teen Titans.
- Legends of Darkover: A Star Trek (2009), Star Wars, and Darkover Crossover
- Lifetime: Doctor Who and Supernatural Crossover
- Loss: A Doctor Who and Harry Potter Crossover.
- Lost In The Woods: Firefly and Star Trek: The Next Generation Crossover.
- Lost Legacy: A Halo and Mass Effect Crossover.
- Lovehammer: A Sailor Moon and Warhammer 40,000 crossover.
- The Magic of Torchwood: Harry Potter, Torchwood Crossover.
- Magic and Myth: A Harry Potter and Thor Crossover.
- Man off the Moon: A Mass Effect and Fate/stay night Crossover.
- The Marker: Dead Space, Mass Effect
- Mass Effect: Clash of Civilizations: A Halo and Mass Effect Crossover.
- Mass Effect The Equestrian Equation: Mass Effect and My Little Pony: Friendship Is Magic Crossover.
- Mass Effect: Human Revolution: A Deus Ex: Human Revolution and Mass Effect Crossover.
- Mass Foundations (Fallout, Mass Effect and Doctor Who)
- Mass Effect New Origins V2: A Halo and Mass Effect Crossover.
- Mass Effect: Records of an Irken Defective: Invader Zim, Mass Effect
- Mass Effect 2: Naruto's Mission: Mass Effect, Naruto
- The Matrix Effect: Mass Effect, The Matrix
- Metal Heart: A The Avengers (2012) and X-Men Film Series Crossover.
- The Mihoshi Incident: A Star Trek: The Next Generation and Tenchi Muyo Crossover.
- Mikami VS The Cybermen: A Tale Most Epic: Death Note and Doctor Who Crossover.
- The Mission Stays The Same: Mass Effect, Warhammer
- Mixed Spirits: Bleach and Doctor Who Crossover.
- Mobile Suit Gundam 00: The Unicorn Awakens: A Mobile Suit Gundam 00 and Mobile Suit Gundam Unicorn Crossover.
- More Trouble than it's Worth: A Doctor Who and Firefly Crossover.
- Mutant Storm: A Harry Potter and X-Men Crossover.
- Mycroft's Folly: A Star Trek (2009) and Sherlock Crossover.
- Mad World (Invader Zim) Invader Zim and Johnny the Homicidal Maniac
- Mythos Effect: CthulhuTech, Mass Effect
- No Gods, Only Guns: Borderlands, Mass Effect
- NoHoper: A Death Note and The House of Night Crossover involving reckless experimentation in search for a cure for Vampyrism.
- Of Rifts and Vampires: Buffy the Vampire Slayer and Torchwood Crossover.
- Of Slings And Arrows: A Harry Potter and X-Men: Evolution Crossover.
- One and Only Son: A Code Geass and Mobile Suit Gundam 00 Crossover.
- Origin Story: A Buffy the Vampire Slayer and Power Girl Crossover set in the Marvel Universe.
- The Other or: Scenes From a Failed Session: A Doctor Who and Homestuck Crossover.
- Outrage: A Doctor Who Crossover.
- Over the Horizon: A Battlestar Galactica (2003) and Stargate SG-1 Crossover.
- The Pandora Incident - an Avatar and Warhammer 40,000 crossover.
- Parallel Processing: Mass Effect and Titanfall crossover.
- Path of Decision, Harry Potter, The Sandman (1989) Crossover. Speculative Fiction
- Patchwork: Doctor Who and Quantum Leap Crossover.
- A Place Where I Belong: A Harry Potter, Stargate SG-1 Crossover which involves dimensional travel.
- Peripheral Vision: A Doctor Who and Torchwood Crossover.
- The Price of Unity: A Halo and Star Wars Crossover.
- Programs of a Lesser God: Death Note, Futurama Crossover.
- Queen of the Swarm: Worm and StarCraft Crossover.
- The Queen Who Fell To Earth: Dragonriders of Pern, Harry Potter Crossover. Soft sci-fi.
- The Raggedy Edge: Firefly and Stargate SG-1 Crossover.
- Reaper's Origin: Mass Effect and Stargate SG-1 Crossover.
- Red Geass: Code Geass, The Mentalist
- Red In Tooth And Claw: A Battlestar Galactica (2003) and Halo Crossover.
- A Red Letter Day: Mass Effect, Red Alert 3: Paradox
- Renegade (Peptuck): Command & Conquer, Mass Effect
- Serenterprise-D: A Firefly and Star Trek: The Next Generation Crossover.
- Shades of Grey: The Aftermath: JAG and Stargate SG-1 Crossover.
- Shifting Times: an Animorphs and Harry Potter Crossover.
- Shinji and the Doctor: A Doctor Who and Neon Genesis Evangelion Crossover.
- Shinji And Warhammer 40 K: A Neon Genesis Evangelion and Warhammer 40,000 crossover.
- Shinobi of the Old Republic: A Knights of the Old Republic and Naruto crossover.
- Silly but Killy: A Warhammer 40,000 and Mass Effect crossover.
- Snakepit: The Draka and Stargate SG-1 Crossover.
- Sparkgate: Agatha and the Grasp of the Serpent God: Girl Genius and Stargate SG-1 Crossover.
- A Square Peg In A Round Hole: Highlander and Stargate SG-1 Crossover.
- Stars Fade: Dragon Age, Mass Effect
- Stargate Equestria: A My Little Pony: Friendship Is Magic and Stargate SG-1 Crossover.
- Stargate Etheria: A Stargate SG-1 and She-Ra and the Princesses of Power crossover.
- Star Wars Force Of Nature: Star Wars Rebels and Godzilla crossover.
- The Stars Will Aid Their Escape: Cthulhu Mythos and My Little Pony: Friendship Is Magic Crossover.
- Superwomen of Eva 2: Lone Heir of Krypton: Neon Genesis Evangelion and Superman crossover.
- Tails of the Old Republic: Sonic the Hedgehog and Star Wars: Knights of the Old Republic Crossover
- Tales of the Otherverse (The DCU, Marvel Universe)
- Task Force 43: Babylon 5 and Star Trek: The Next Generation Crossover.
- Ten Times The Doctor Met Sailor Pluto: Doctor Who and Sailor Moon Crossover.
- Ten Zero: Code Geass and Warframe Crossover.
- Terran Ingenuity: StarCraft and Mass Effect Crossover.
- Thinking In Little Green Boxes: Deadpool, Harry Potter Crossover. Mutants, cyborgs, superpowers, Sufficiently Analyzed Magic.
- Thousand Shinji: A Neon Genesis Evangelion and Warhammer 40,000 crossover.
- Time Anomaly (Doctor Who, Marvel Cinematic Universe)
- To Inherit the Future: A Mass Effect and NieR: Automata crossover.
- Tokimeki PokéLive! and TwinBee: A Pokémon, Love Live!, Tokimeki Memorial and Twinbee crossover with alternate dimensions and time travel involved.
- Twenty Years Late: A Half-Life and XCOM: Enemy Unknown crossover.
- Tyrant Kings: A Jurassic Park and Mass Effect Crossover.
- The Vampire of Steel: A Buffy the Vampire Slayer and Supergirl crossover.
- Vigil (Peptuck): A Mass Effect, X Com Enemy Unknown, Eclipse Phase, FEAR, and Destiny Crossover.
- Vision: A BioShock and My Little Pony: Friendship Is Magic Crossover.
- Visited by a Doctor: A Doctor Who and Harry Potter Crossover.
- Wand and Shield: The Avengers (2012) and Harry Potter Crossover.
- The War Of Kings: Code Geass, Fate/Stay Night
- The Way of Things: Blackpool and Doctor Who Crossover.
- The Weaver Option: A Worm and Warhammer 40,000 crossover.
- When Life Gives You Lemons (Worm/Portal): Worm and Portal Crossover.
- When There Was a Tomorrow: A Halo and Mass Effect Crossover.
- Wonderful (Mazinja): A Worm and The Wonderful 101 crossover.
- Worldwar: Discovering the Balance: Battlestar Galactica (2003), Stargate SG-1, and Worldwar Crossover.
- Worm-in-Waiting: A Worm and Warframe crossover.
- XCOM: Second Contact: Mass Effect, XCOM: Enemy Unknown
- XSGCOM: Goa'uld Defence: Stargate SG-1 and XCOM Crossover.
- A Year With Q: A Harry Potter and Star Trek: The Next Generation Crossover.
- Zero vs Kira: Code Geass, Death Note Crossover. Inter-dimensional travel, alternate realities, giant robots, monsters from another world.
- Roanapur Connection (Crossover with Black Lagoon)
Everything else
- Alternative Gods: A Death Note Cyberpunk AU.
- Aran's Daughter (Metroid)
- Atonement (Worm): A Worm fanfic.
- Aurora Falls: A Subnautica AU fanfic.
- The Calvinverse: A sci-fi-based Calvin and Hobbes Fan Verse.
- Canonfodder: A Transformers: Prime Self-Insert Fic.
- Can't Get Next to You: A Fringe fanfic.
- Cyberpunk: An underwater dystopia: A SpongeBob SquarePants Cyberpunk AU.
- Flickers: A Fringe fanfic.
- Gift: A Mobile Suit Gundam 00 fanfic.
- Harry Potter and the Methods of Rationality: Harry Potter as a scientist.
- Imperium Ascendant: A Warhammer 40,000 fanfic.
- Infinity: A Lyrical Nanoha fanfic.
- Intrepid: A Worm fanfic.
- Kancolle Alt: A KanColle fanfic with helpings of War Is Hell and Do Androids Dream?.
- Let the Galaxy Burn: A Song of Ice and Fire reimagined as a Space Opera AU fic.
- Mobile Suit Gundam Alpha: A Mobile Suit Gundam based story set around a galactic scale version of the One Year War.
- The Mortal Son: A Warhammer 40,000 fanfic.
- Paradoxus (Winx Club)
- Pictopia II: A super-hero fanfic based on Alan Moore's short story In Pictopia
- Quicken: A Worm fanfic.
- Raised by Jägers: A Girl Genius fanfic.
- Recovery None: A Red vs. Blue Alternate Universe Fic.
- Repairs (Metroid)
- Rise from Darkness (Metroid)
- The Subspace Emissary's Worlds Conquest
- Synthesis: A Vocaloid fanfic.
- Warp (xbritomartx): A Worm/Ward Peggy Sue fanfic.
- Weyr Life: Dragonriders of Pern fanfic.
- Who Tries, Does: Dragonriders of Pern fanfic.
- Worldwar: War of Equals: a Worldwar fanfic.