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Beyond Science: Pandora's Box by Alexandroid99
Doug Rattman finds himself waking up after going into cryogenic sleep after the events of the comic. His leg injured, he sets off to continue surviving and to find out what happened in the meantime. In a different time, Gordon Freeman survives a traincrash with Alyx and witnesses the explosion of the Citadel ruins, which marks the arrival of a blue box as the Vortigaunts made sure.
Crossover - Doctor Who & Portal - Rated: K - English - Sci-Fi - Chapters: 3 - Words: 2,366 - Follows: 3 - Updated: 11/27 - Published: 2/6 - 11th Doctor, D. Rattmann, GLaDOS, Weighted Companion Cube
Two Rats in a Maze by DarthJosef reviews
Chell is surprised when a man in a blue box appears in a test chamber at Aperture Laboratories
Crossover - Doctor Who & Portal - Rated: K - English - Sci-Fi/Adventure - Chapters: 5 - Words: 7,278 - Reviews: 24 - Favs: 37 - Follows: 43 - Updated: 11/26 - Published: 3/20/2013 - Chell, GLaDOS - Complete
Now You're Thinking with Real Science by Jaywings reviews
A former test subject, now free, takes up residence in a strange town where almost nothing is considered abnormal. A year later, a young paranormal enthusiast spots two odd new satellites orbiting the moon and immediately makes plans to bring them to Earth, firmly believing that the two metal spheres are alien in origin. Because, after all, what else could they possibly be?
Crossover - Invader Zim & Portal - Rated: T - English - Adventure/Friendship - Chapters: 21 - Words: 145,079 - Reviews: 109 - Favs: 87 - Follows: 104 - Updated: 11/26 - Published: 8/6/2013 - Dib, Zim, Wheatley, GLaDOS
Times Change by Periwinklerene reviews
Three years after Portal 2, the Doctor finds Wheatley desperate and dying and tries to help him by taking him back to Aperture to fix him. Something goes wrong, and slowly the two find that they're at the center of something much, much bigger than themselves.
Crossover - Doctor Who & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 4 - Words: 10,196 - Reviews: 8 - Favs: 5 - Follows: 9 - Updated: 11/23 - Published: 10/10 - 10th Doctor, Chell, GLaDOS, Wheatley
Portals fill you with Determination by Personality Construct reviews
Sans is aware. He knows about the resets, and can travel through his 'short-cuts' to many places in Undertale. And one day, to Aperture Science.
Crossover - Portal & Undertale - Rated: K - English - Humor - Chapters: 14 - Words: 13,406 - Reviews: 13 - Favs: 25 - Follows: 33 - Updated: 11/15 - Published: 5/2 - Chell, Wheatley, Sans
Minecraft vs Portal 1! by joshman501
Minecraft Steve gets sucked into Portal 1, and now he must beat the game! Will he win, will he even survive? Read this awesome crossover to find out!
Crossover - Portal & Minecraft - Rated: K - English - Adventure/Suspense - Chapters: 1 - Words: 3,233 - Published: 11/3 - GLaDOS, Morality Core, Turret, Steve
The Things We Do For Science by Kineil D. Wicks reviews
Cooperative testing is supposed to bring people together through science. Cake is often a good motivator, but escaping a madhouse that tries to pass itself off as a science facility works better. Will they escape? Or will the facility keep them clutched in its iron grasp forever?...
Crossover - Portal & Don't Starve - Rated: T - English - Adventure - Chapters: 50 - Words: 44,620 - Reviews: 10 - Favs: 3 - Follows: 4 - Updated: 10/27 - Published: 5/5/2015 - Wilson H., Willow
Robots Also Fear by ghostwalker13
There's a left-behind place: no-one knows what goes on. P-Body and Atlas are sent to explore the 'ruins' of what used to be a 'restaurant/storage facility' for these 'other robots'. Whatever is down there, it isn't too happy to be seeing new faces.
Crossover - Portal & Five Nights at Freddy´s - Rated: T - English - Adventure/Horror - Chapters: 4 - Words: 2,159 - Favs: 1 - Follows: 2 - Updated: 10/26 - Published: 10/19
Calder's adventures: Wrath of Chara by TitanMoose666 reviews
Stuff happens.
Crossover - Portal & Undertale - Rated: T - English - Humor/Adventure - Chapters: 1 - Words: 104 - Reviews: 1 - Published: 10/20
Portal 2 fanfic----I don't care by TitanMoose666 reviews
When a person gets trapped in the portal world, what the hell are they going to do?
Crossover - Portal & Half-Life - Rated: T - English - Sci-Fi/Friendship - Chapters: 7 - Words: 2,439 - Reviews: 2 - Updated: 10/14 - Published: 10/10 - Gordon F., Chell, GLaDOS, Weighted Companion Cube
Pikmin vs Portal 1 by joshman501
What if Olimar was sucked into Portal 1 with his Pikmin? Would he survive? Would he defeat Glad0s? Would Glad0s instantly kill him? Read this awesome story to find out!
Crossover - Pikmin & Portal - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 1 - Words: 2,523 - Published: 10/12 - GLaDOS, Turret
Portalborn by Experiment 282 reviews
In the land of Skyrim, the Dragonborn is a hot-blooded thrill seeker. An encounter with a weird man and a talking meteorite ball thing that rambles about space sets her off on something weird indeed...
Crossover - Elder Scroll series & Portal - Rated: T - English - Adventure/Humor - Chapters: 61 - Words: 384,880 - Reviews: 75 - Favs: 85 - Follows: 75 - Updated: 10/4 - Published: 2/17/2012 - Dragonborn/Dovahkiin, D. Rattmann, Wheatley, Chell
Frost by Gladys Johnson reviews
Chell and Her sister Gladys replace Elsa and Anna respectively Same plot as Frozen but Modern and Video Games Half Life is Involved and Small Pokemon References OC is Gladys
Crossover - Portal & Frozen - Rated: K+ - English - Family/Adventure - Chapters: 2 - Words: 190 - Reviews: 1 - Published: 9/24 - [Cave Johnson, Caroline] Chell, OC
Digital Hearts by JustAnotherFandomWriter reviews
A chance discovery leads Mettaton to cross paths with a certain robot who's intelligence and elegant beauty rivals his own, causing him to uncover something deep within himself.
Crossover - Portal & Undertale - Rated: T - English - Humor/Romance - Chapters: 4 - Words: 2,028 - Reviews: 3 - Favs: 11 - Follows: 11 - Updated: 9/10 - Published: 1/16
the phantom of aperture by siramay reviews
From there hideout beneath aperture theater the evil Phantom schemes to get closer to test subject and preformer parsect The Phantom strong-arms management into giving the budding starlet key roles but parsect instead falls for arts benefactor and test subject chell Terrified at the notion of his absence the Phantom enacts a plan to keep parsect by his side while chell tries to sto
Crossover - Portal & Phantom of the Opera - Rated: K+ - English - Parody/Drama - Chapters: 1 - Words: 5 - Reviews: 2 - Published: 9/9
A Portal In Time by legoagentny reviews
When Tracer wakes up in a strange room in Apeture, she wonders how she got there and how to get out. With the help of a mysterious scientist and an orange robot named Virgil, she sets off to find a way out of the dangerous facility.
Crossover - Portal & Overwatch - Rated: K+ - English - Mystery/Sci-Fi - Chapters: 3 - Words: 1,650 - Reviews: 2 - Favs: 4 - Follows: 9 - Updated: 8/8 - Published: 7/12
Neon Genesis: The Aperture Defense Network by PixelsShattered
After the Second Impact, the body of Lilith is hastily moved to the most defensible place on the planet, somewhere most people have never heard of, and somewhere the government wanted to keep under the rug. Aperture Science, Michigan Branch is quickly fortified and the one person GLaDOS vowed to never awaken is forced to be brought out of stasis. First of this kind, R&R!
Crossover - Evangelion & Portal - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 7,679 - Favs: 7 - Follows: 7 - Updated: 7/24 - Published: 4/19 - Chell, GLaDOS, Wheatley
Fallout: Aperture Science by cpl20
The wasteland is a dangerous place. Chell hasn't seen the outside of aperture for over two hundred years. Now she is about to learn how much the world has changed while she was gone...
Crossover - Fallout & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 2,684 - Favs: 6 - Follows: 7 - Updated: 7/13 - Published: 7/12 - Chell
Is Your Great-Aunt an AI? ! by Quatermass reviews
Petunia sends a baby Harry to her aunt, living in America, Caroline Evans. Some years later, Caroline becomes GLaDOS, and only Harry stops her from her rampage. Now, Harry is eleven, and he's heading to Hogwarts. Of course, with an amoral scientist/computer for a great-aunt and a mute big sister, the question is not whether he is ready for Hogwarts. Is Hogwarts ready for him?
Crossover - Harry Potter & Portal - Rated: T - English - Humor/Fantasy - Chapters: 18 - Words: 47,678 - Reviews: 295 - Favs: 1,277 - Follows: 1,332 - Updated: 7/11 - Published: 10/18/2015 - [Harry P., Hermione G.] Chell, GLaDOS - Complete
GLaDtobeyourfriend by TheExpL0DiNgaPplE reviews
Fluttershy has stumbled upon something hidden deep in the Everfree Forest only to bring about something from the past. Something ancient has been hiding for a VERY longtime. Something very GlaD to be still alive and back.
Crossover - My Little Pony & Portal - Rated: T - English - Adventure/Friendship - Chapters: 20 - Words: 43,188 - Reviews: 51 - Favs: 37 - Follows: 59 - Updated: 7/6 - Published: 12/14/2014 - Twilight Sparkle, Fluttershy, GLaDOS, Wheatley
PorTale by IgnisWings reviews
The monsters of the underground live peacefully, before a human salt mine, some abandoned labs, and a murderous computer are discovered. The characters shall test their way out of the abandoned labs. Rated K , due to Portal's rating.
Crossover - Portal & Undertale - Rated: K+ - English - Sci-Fi/Angst - Chapters: 8 - Words: 5,299 - Reviews: 12 - Favs: 19 - Follows: 33 - Updated: 6/21 - Published: 1/29 - Cave Johnson, GLaDOS, OC, Papyrus
Weatley and Space Cores UnBEARable Adventure by thenewjimmyj reviews
When Space Core accidentally bumps into Wheatley he sends themselves back to earth to the humid san fransisco. I will tell more in the story.
Crossover - Portal & We Bare Bears - Rated: K+ - English - Humor/Adventure - Chapters: 5 - Words: 1,283 - Reviews: 4 - Follows: 1 - Updated: 6/14 - Published: 11/13/2015
Welcome to Aperture by HRHTURQ
In which Carlos lays around in a pool of oobleck, and is subsequently kidnapped by Atlas, P-Body and POTaTOS. Cecil wears a juniper ball gown and his favorite diving helmet, and the Faceless Old Woman Googles pictures of cremains.
Crossover - Portal & Welcome to Night Vale - Rated: T - English - Humor/Romance - Chapters: 2 - Words: 5,487 - Updated: 6/13 - Published: 6/6 - ATLAS, GLaDOS, P-body
Everybody Wants You Gone by Citrus Sinensis reviews
Just a silly Songfic that popped into my head at an outrageously late hour, just Harry singing GLaDOS'song from Portal 2 before killing Voldy in DH. Yes the title sucks, no I dont care. I don't own HP, Portal, a PC, or Sweden. Reviews and co. very much appreciated. Enjoy!
Crossover - Harry Potter & Portal - Rated: K+ - English - Humor/Poetry - Chapters: 1 - Words: 560 - Reviews: 1 - Favs: 1 - Published: 6/11
Compy: Keeper Of Memory by GingerFloof26 reviews
Fouth installment in the "Compy" series. Compy, formerly known as GLaDOS, and Lucca Ashtear plunge headlong into a conflict with the Combine in an effort to retrieve the Frozen Flame. But the greatest obstacles they face will be from within. Can they surmount their own fears in time to prevent a multidimensional disaster?
Crossover - Chrono Trigger & Portal - Rated: K+ - English - Romance/Sci-Fi - Chapters: 4 - Words: 5,084 - Reviews: 4 - Updated: 6/5 - Published: 11/26/2015
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