Portal Crossovers
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Half-Life and Portal Drabbles by EvilToTheCore13
A collection of Half-Life and Portal drabbles, some for the r/fanfiction Discord Drabble Night, some for other challenges and prompts. (The genres only really describe the first one, since there's a lot of variety, although I guess they're all "sci-fi" to some extent).
Crossover - Half-Life & Portal - Rated: T - English - Sci-Fi/Horror - Chapters: 3 - Words: 495 - Updated: 4/24/2020 - Published: 10/19/2019 - G-Man, Gordon F., Caroline, Cave Johnson
PortalBorderlands: The Girlfriend by iammemyself reviews
Having a girlfriend is REALLY hard, but it's also way more awesome than he'd thought it was going to be. This story is NOT CRACK. It's a serious Claptrap X GLaDOS story. For real.
Crossover - Portal & Borderlands - Rated: K - English - Romance/Friendship - Chapters: 6 - Words: 20,719 - Reviews: 8 - Favs: 39 - Follows: 39 - Updated: 4/14/2020 - Published: 10/24/2018 - [GLaDOS, Claptrap] - Complete
Finally Human (A Portal Fanfiction) RETURNING by Morgan64 reviews
What would happen if Wheatley and GLaDoS were finally human?
Crossover - Half-Life & Portal - Rated: T - English - Sci-Fi/Mystery - Chapters: 5 - Words: 1,809 - Reviews: 1 - Favs: 7 - Follows: 5 - Updated: 3/12/2020 - Published: 12/2/2015 - GLaDOS, Wheatley
business partnership by crawfy reviews
Short story of a man who learned what happens to people who cannot repay their debt to Teiai even if they would work their whole life.
Crossover - Portal & Kaiji - Rated: K - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,029 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 1/19/2020
Think in Ponies by Silver Arctic Wolf reviews
Trouble at the Aperhoof Science Enrichment Center: personality sphere Spike needs to find somepony to test the portal gun, or he's in big trouble. But due to some errors, all the test subjects in cryosleep are in no fit state for doing anything. Luckily for Spike, he's got one pony left who has a great testing record.
Crossover - My Little Pony & Portal - Rated: T - English - Parody/Adventure - Chapters: 6 - Words: 15,547 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 10/28/2019 - Published: 10/2/2019 - Twilight Sparkle, Fluttershy, Spike - Complete
Alien Isolation: Portal Edition by wysha.thorne reviews
Amanda on Sevastopol with a portal gun, everybody's favourite sarcastic core guiding her, the xenomorph, working joes, and... SEARCH MODE ACTIVATED (yep, those pesky little sods. Also based on a dream I had prior to writing It Takes Two.
Crossover - Portal & Alien: Isolation - Rated: M - English - Sci-Fi/Humor - Chapters: 1 - Words: 904 - Reviews: 1 - Favs: 1 - Follows: 2 - Published: 10/15/2019
Alien Isolation: Portal Edition by wysha.thorne reviews
Amanda on Sevastopol with a portal gun, everybody's favourite sarcastic core guiding her, the xenomorph, working joes, and... SEARCH MODE ACTIVATED (yep, those pesky little sods. Also based on a dream I had prior to writing It Takes Two.
Crossover - Portal & Alien: Isolation - Rated: M - English - Sci-Fi/Horror - Chapters: 1 - Words: 904 - Reviews: 2 - Follows: 1 - Published: 10/14/2019
Test Protocol by Celtic Knot reviews
The Illusive Man sends Shepard to investigate a missing Cerberus cell. Her team becomes trapped in the facility and must outwit a hostile AI in order to escape. But when they finally get back to the Normandy, they find the ordeal is far from over...
Crossover - Mass Effect & Portal - Rated: T - English - Drama/Humor - Chapters: 2 - Words: 6,546 - Reviews: 5 - Favs: 17 - Follows: 31 - Updated: 10/2/2019 - Published: 9/2/2019 - [J. Garson, Thane K.] EDI, GLaDOS
Two Ships by csvolny
What would happen if the Half-Life protagonist were to meet the Portal protagonist? In the broken streets of downtown City 17, this is what happened. Rated T, for violence.
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 1 - Words: 5,315 - Favs: 8 - Follows: 4 - Published: 9/9/2019 - Gordon F., Chell - Complete
The Before and After by CurlyFriDays reviews
Wheatley remembers his before. His humaness. An Epilogue of sorts to The Threat Underground
Crossover - Turing Test & Portal - Rated: K - English - Adventure/Sci-Fi - Chapters: 2 - Words: 731 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 9/8/2019 - Complete
The Threat Underground by CurlyFriDays reviews
GLaDOS lurks underground near a growing city, only a few know the true threat she is. Our main crew will have to delve into their own memories and venture underground to defeat GLaDOS. The sequel to The Curse Of The Cure
Crossover - Turing Test & Portal - Rated: K+ - English - Sci-Fi/Friendship - Chapters: 5 - Words: 3,560 - Reviews: 5 - Published: 9/8/2019 - Complete
Becoming Whole by CurlyFriDays reviews
Chell has finally been released from Aperture. But the world she left is not the same as the one she's entering. Chell meets up with Lieutenant Hank Anderson and newly deviant Connor. What happens when they all meet? Antics, chaos, and pranks. That's what. Eventual family relations
Crossover - Portal & Detroit: Become Human - Rated: K+ - English - Humor/Sci-Fi - Chapters: 11 - Words: 8,015 - Reviews: 12 - Favs: 6 - Follows: 5 - Updated: 8/17/2019 - Published: 7/29/2019
The Curse Of The Cure by CurlyFriDays reviews
We always knew humanity would end, we just never thought the apocalypse would be brought on by humans.
Crossover - Turing Test & Portal - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 8 - Words: 6,757 - Reviews: 6 - Updated: 7/19/2019 - Published: 5/19/2019 - Complete
It's Where Parallel Lines Intersect by lilac-kat reviews
Everyone knows love has no boundaries. Not even the hard borders of good and evil can keep it at bay. That thing about parallel lines never intersecting? Pssh. Whether we like it or not, love can and will make any two such lines perpendicular. (i.e. obvious crackship is obvious but I tried '\ (ツ) /' )
Crossover - Cyberchase & Portal - Rated: K+ - English - Friendship/Romance - Chapters: 1 - Words: 2,712 - Reviews: 2 - Favs: 2 - Follows: 2 - Published: 7/7/2019 - [Motherboard, GLaDOS] - Complete
Welcome to the Aperture Science EnRICKment Centre by KettleDweller reviews
Rick and Morty set a course for adventure, diving head-long into the weird and mysterious Aperture Science Enrichment Centre. But someone else is lurking in the facility, watching their eeevery move. Will Rick and Morty's adventure turn into a nightmare? Will they make it back home in one piece? Will Jerry save the day?...probably not! (Also on AO3 under the same name)
Crossover - Portal & Rick and Morty - Rated: T - English - Humor/Sci-Fi - Chapters: 11 - Words: 32,782 - Reviews: 5 - Favs: 19 - Follows: 20 - Updated: 6/15/2019 - Published: 7/10/2018 - GLaDOS, Weighted Companion Cube, Morty S., Rick S.
PortalBorderlands: Wheatley and Claptrap's Pandora Adventure by iammemyself reviews
A trip to retrieve something nice for GLaDOS goes a bit haywire, but a little teamwork between BFFs will take care of THAT. If you recognise this, yes, this was originally part of another fic. It's been re-edited to stand alone because I felt it worked well that way.
Crossover - Portal & Borderlands - Rated: K - English - Adventure/Friendship - Chapters: 1 - Words: 19,390 - Reviews: 1 - Favs: 6 - Follows: 4 - Published: 6/13/2019 - Wheatley, Claptrap
Hamilton In Portal by MusicalFan2005 reviews
Alexander Hamilton never asked to do testing, so using his skills from fighting in the war, he attempts to escape. He should indeed be able to escape Aperature Science
Crossover - Portal & Hamilton - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 1 - Words: 880 - Reviews: 1 - Favs: 2 - Follows: 2 - Published: 6/2/2019 - A. Hamilton
As One Door Closes by jkawsome reviews
Izuku isn't sure how he ended up in Aperture Science, why his memory is faulty, or what his new companions and the mysterious AI have to do with anything. But what he does know is that if he wants to survive long enough to find out, he's going to have to start thinking with portals.
Crossover - Portal & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Drama/Friendship - Chapters: 1 - Words: 6,462 - Reviews: 9 - Favs: 33 - Follows: 28 - Published: 5/10/2019 - Izuku M., Ochako U., Shouto T., Shouta A./Eraserhead
Mammals of Aperture Science by MagicAlpha reviews
Finding herself in the research complex known as Aperture Science, a rabbit finds herself trying solve all of the experimental test chambers that the Enrichment Center has laid out before her. On top of all that, she unfortunately ends up stumbling into a fox along the way who is totally not making things any easier for her.
Crossover - Portal & Zootopia - Rated: T - English - Humor/Adventure - Chapters: 7 - Words: 18,280 - Reviews: 9 - Favs: 11 - Follows: 10 - Updated: 4/29/2019 - Published: 3/27/2019 - Judy H., Nick W. - Complete
Half Life : A Path Divided by discet04 reviews
What if Chell had managed to fight off the party escort bot after her showdown with GLaDOS. Freed from the Enrichment Center to explore the world beyond, for better or worse. "Things have changed since the last time you left the building. What's going on out there will make you wish you were back in here..."
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 5 - Words: 23,529 - Reviews: 15 - Favs: 50 - Follows: 70 - Updated: 4/21/2019 - Published: 1/19/2017 - Alyx V., Chell, D. Rattmann
My Little Portal: rewrite by The Cowardly Christian reviews
Major AU! What if Twilight wasn't the only one who believed in Nightmare Moon's return? What if he believed not in an ancient relics, but SCIENCE! How would thinks pan out that fateful sunset celebration?
Crossover - My Little Pony & Portal - Rated: M - English - Supernatural/Sci-Fi - Chapters: 1 - Words: 1,308 - Reviews: 1 - Favs: 2 - Follows: 1 - Published: 3/18/2019 - [Twilight Sparkle, Wheatley]
Black Science by CervantesOsis reviews
Blake Belladona is sent on a mission for the White Fang. Her objective: investigate an old research facility abandoned since the great war. The name of this facility? Aperture Science.
Crossover - Portal & RWBY - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 7 - Words: 17,037 - Reviews: 33 - Favs: 112 - Follows: 155 - Updated: 1/23/2019 - Published: 3/23/2018 - GLaDOS, Wheatley, Blake B., Adam T.
The Alliance by DMClover123 reviews
This is a crossover of Portal and Quantum Conundrum where Cave and Professor Quadwrangle work together but what will happen when the GLaDOS project comes around? How will Professer Quadwrangle react? This was written for fun so tell me what you think.
Crossover - Quantum Conundrum & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,064 - Reviews: 2 - Updated: 1/22/2019 - Published: 12/24/2012 - Caroline
Bring Her Home by samuraistar reviews
Maybe not the crossover we've all been waiting for, but definitely the one I've been waiting to write! Chell finds her way out of Aperture Labs and into Hero's Duty, where she finds something she never thought possible: A female entity who DOESN'T want her dead.
Crossover - Wreck-It Ralph & Portal - Rated: K+ - English - Hurt/Comfort/Tragedy - Chapters: 1 - Words: 1,320 - Reviews: 3 - Favs: 8 - Follows: 5 - Published: 12/9/2018 - Chell, Sgt. T. J. Calhoun - Complete
Murderous AI by Smart Kira
This is a poem I wrote about GLaDOS and Shodan
Crossover - Portal & System Shock - Rated: K - English - Poetry - Chapters: 1 - Words: 80 - Favs: 1 - Published: 11/22/2018 - GLaDOS, Shodan - Complete
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