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Portals of DOOM! by Cat Fishy reviews
After being released from Aperture, Chell has reintegrated with hyuuman society, but something is wrong. Why is everyone so stupid? Is that green kid really an alien? And did Black Mesa somehow cause the apocalypse? Meanwhile, Red and Purple wreak havoc on the universe, and Miyuki is not impressed. No pairings, mostly canon, post-Portal 2/The Trial.
Crossover - Invader Zim & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 19 - Words: 14,512 - Reviews: 12 - Favs: 7 - Follows: 4 - Updated: 3/28 - Published: 1/13/2013 - Dib, Almighty Tallest Miyuki, Chell, GLaDOS
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: 15 - Words: 28,419 - Reviews: 13 - Favs: 10 - Follows: 19 - Updated: 3/27 - Published: 12/14/2014 - Twilight Sparkle, Fluttershy, GLaDOS, Wheatley
Mystery Dungeon: Portal Rescue Team by Xelac reviews
GLaDOS, Chell, Wheatley, and others from Aperture find themselves stuck in another universe and turned into Pokemon. With nothing else to do, the form a rescue team as an excuse to explore Dungeons and search for leads on how they got into this world and how they can get home.
Crossover - Pokémon & Portal - Rated: K+ - English - Adventure/Humor - Chapters: 1 - Words: 5,077 - Reviews: 2 - Favs: 4 - Follows: 4 - Published: 3/27 - Chell, GLaDOS, Wheatley
Grief Science by CornetHummy reviews
"You can have whatever you want if you just wish for it." It's a tempting proposition, but it comes with consequences. Chell knows them well, but she may be the last hope of a divergent timeline. Portal/Madoka fusion AU. Humanized cores and GLaDOS, for a given measure of "human." Spoilers for Madoka Magica.
Crossover - Portal & Puella Magi Madoka Magica/魔法少女まどか★マギカ - Rated: T - English - Supernatural/Drama - Chapters: 26 - Words: 170,013 - Reviews: 21 - Favs: 17 - Follows: 9 - Updated: 3/24 - Published: 11/16/2013 - Chell, GLaDOS, Wheatley, Kyubey - Complete
Project Memento - Storyline A by Beta-D-glucose
Sometime after the Red Alert incident, the maverick hunters receive a strange call for help, which brings them to even stranger places. The facilities of the Aperture Science holds many mystery, and deadly traps. Will they able to pull it off, and stay alive? (This is the third - Axl's - parallel storyline. Check out the other two as well! OC content.)
Crossover - Mega Man & Portal - Rated: T - English - Adventure/Humor - Chapters: 1 - Words: 2,166 - Favs: 1 - Follows: 1 - Published: 3/24 - Axl, X, Zero, Wheatley
Aperture technology in Forks by Astraga
Some time after Chell left Glados made an android of a metal from space that Cave Johnson bought, that android disguised as Chell go to Forks to explore the surface and find the Cullen's what will she do? and when a menace appears will the Cullen's enter the strange world of aperture?
Crossover - Twilight & Portal - Rated: K+ - English - Romance/Adventure - Chapters: 2 - Words: 1,719 - Favs: 1 - Follows: 2 - Published: 3/22
The Past Retold by Phoenixflame of Thunderclan
WX-78 has been in charge of Old Aperture for two years. Two people come by, and ask him what had happened during, before, and shortly after the events of Portal 2. Takes place about 12 years after Portal 2. There is no fluff scenes, but CarolineXCave. Rated K only for retold death.
Crossover - Portal & Don't Starve - Rated: K+ - English - Chapters: 1 - Words: 2,208 - Published: 3/20
The New Story by PixelsShattered
After escaping Aperture, Chell finds herself in a new place, with a new voice, and no way out. Reviews super appreciated. Rated T out of paranoia
Crossover - Portal & Stanley Parable - Rated: T - English - Humor/Adventure - Chapters: 3 - Words: 2,487 - Favs: 1 - Follows: 1 - Updated: 3/20 - Published: 2/22 - Chell, Weighted Companion Cube, Stanley, Narrator
Mann to the Core by yodapopper reviews
Wheatley does a bit of a rough landing in 2Fort, providing some much-needed change in an eternal war between brothers. But can Wheatley -and the mercenaries- adapt to the changes, or will things take a turn for the worse? No humanisations. (The TF2-verse is AU in one vital aspect: Gray Mann never happened, which means that all connected events (such as MvM) haven't occured either)
Crossover - Portal & Team Fortress 2 - Rated: T - English - Adventure/Friendship - Chapters: 13 - Words: 30,685 - Reviews: 30 - Favs: 15 - Follows: 20 - Updated: 3/19 - Published: 6/4/2014 - Wheatley, Engineer
AvengersAperture Series 4: Holidays with the Odinsons by GingerFloof26
Loki and Thor invite all their friends- and some rivals- to Asgard for the holidays, in order to prove that Loki has turned a new leaf. GLaDOS accepts the invitation in order to prove the same, but has she really done so? Perceived betrayal may lead to closer bonds, as the two discover. This time, rated T with censored sex scenes and edited language.
Crossover - Portal & Avengers - Rated: T - English - Adventure/Humor - Chapters: 4 - Words: 15,901 - Published: 3/18
Compy: Initializing Connection by GingerFloof26
Prequel to the Portal fanfic "Compy." The brilliant scientist Lucca Ashtear makes a discovery that could alter the fate of dimensions- including the world of Portal. But when she is faced with an ultimatum, she decides to give up what she loves most to GLaDOS, and the ramifications change the A.I's life forever.
Crossover - Chrono Trigger & Portal - Rated: T - English - Sci-Fi/Romance - Chapters: 11 - Words: 18,772 - Published: 3/18 - Complete
Project Memento - Storyline Z by Beta-D-glucose reviews
Sometime after the Red Alert incident, the maverick hunters receive a strange call for help, which brings them to even stranger places. The facilities of the Aperture Science holds many mystery, and deadly traps. Will they able to make it through? Let's find out! (This is the second - Zero's - parallel storyline. Check out the others as well! OC content.)
Crossover - Mega Man & Portal - Rated: T - English - Adventure/Family - Chapters: 1 - Words: 1,307 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 3/16 - Axl, X, Zero, GLaDOS
Samus' Trial with Portals by Ancient Dragon writer reviews
Samus is found guilty of destroying the BSL station and is sentenced to five years imprisonment to the Aperture Science Enrichment Center. GLaDOS is thrilled about the new test subject arriving due to boredom. Will Samus survive these tests? Will GLaDOS kill her before anything begins? Or will Samus and GLaDOS end up getting along? GLaDOS: Who knows read the story and find out.
Crossover - Metroid & Portal - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 936 - Reviews: 1 - Favs: 3 - Follows: 5 - Updated: 3/15 - Published: 8/11/2014
Project Memento - Storyline X by Beta-D-glucose reviews
Sometime after the Red Alert incident, the maverick hunters receive a strange call for help, which brings them to even stranger places, filled with many mystery. Whether they fall into a deadly trap in the facilities the Aperture Science or not... of course they do. The real question is: will they be able to escape from it? (This is one of the three parallel storylines. OC content)
Crossover - Mega Man & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 1,784 - Reviews: 1 - Published: 3/14 - Axl, X, Zero, GLaDOS
The Doctor and Wheatley by BasementDragon101
Wheatley has been in space forever. Everyday has been the same. Until one day when a blue box appears. Wheatley travels with a strange man known as the Doctor, and they go to Earth to say sorry to Chel. But then, they learn more than what they wanted about Aperture.
Crossover - Doctor Who & Portal - Rated: K+ - English - Humor/Sci-Fi - Chapters: 1 - Words: 560 - Follows: 1 - Published: 3/10
The World After by Imperator Augustus
GLaDOS realizes that maybe she can't just delete feeling from herself, that she needs that mute lunatic in her artificial life Yeah, it's not actually a crossover, Portal and Half Life are in the same Universe
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 787 - Published: 3/9
The Backstory of Model WX-78 by Phoenixflame of Thunderclan reviews
WX-78 was built in Aperture Science shortly after the event of Portal 2. He and GLaDOS constently fought, but after finding out that GLaDOS has a "secret" that he had known ever sense being built, she turns on him, and makes him what he is now...
Crossover - Portal & Don't Starve - Rated: K+ - English - Chapters: 1 - Words: 3,290 - Reviews: 1 - Favs: 1 - Published: 3/1 - GLaDOS, WX-78, Maxwell/William C. - Complete
After Aperture by Shius reviews
After everything she's been through, all the testing, mocking, and fighting with A.I.'s, Chell is finally free from Aperture. But what now? Without any knowledge of the outside world, and the war between humanity and the Combine, how will Chell survive? Follow the story of our favourite mute protagonist as she dives head first into the world of Half-Life, the world beyond Aperture.
Crossover - Portal & Half-Life - Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 53,139 - Reviews: 44 - Favs: 56 - Follows: 87 - Updated: 2/23 - Published: 7/26/2013 - Alyx V., Gordon F., Chell, D. Rattmann
Turret bender by du911
Deep within the bowels of aperture science...A lone turret sings it's requiem... Inspired by machinima!
Crossover - Portal & Legend of Korra - Rated: T - English - Hurt/Comfort/Sci-Fi - Chapters: 1 - Words: 377 - Published: 2/23 - Turret, Korra
CODE: TURRET by du911
Deep within the bowels of aperture science...A lone turret sings it's requiem... Inspired by machinima!
Crossover - Portal & Code Lyoko - Rated: T - English - Sci-Fi/Hurt/Comfort - Chapters: 1 - Words: 411 - Published: 2/23 - Turret, Aelita S.
The turret sings by du911
Deep within the bowels of aperture science...A lone turret sings it's requiem... Inspired by machinima!
Crossover - Portal & Phineas and Ferb - Rated: T - English - Hurt/Comfort/Sci-Fi - Chapters: 1 - Words: 382 - Published: 2/23 - Turret, Fireside Girls
TURRET FALLS by du911
Deep within the bowels of aperture science...A lone turret sings it's requiem... Inspired by machinima!
Crossover - Portal & Gravity Falls - Rated: T - English - Tragedy/Hurt/Comfort - Chapters: 1 - Words: 383 - Favs: 1 - Published: 2/23
PAW Patrol: Still Alive by SMBCrossovers reviews
The PAW Patrol has found someone that will change their lives forever: Wheatley!
Crossover - Portal & PAW Patrol - Rated: K - English - Adventure - Chapters: 1 - Words: 203 - Reviews: 2 - Published: 2/23
The Science of Art by ThunderRaptor reviews
Aperture had always been known as a place of science. Yet, there was a place where no one except for the founder knew of that contained something else. Years later, a lost test subject and her potato companion stumble across what seems like a lost gallery, but what lies within is a place of beauty and horror neither could possibly imagine.
Crossover - Portal & Ib - Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 4,521 - Reviews: 4 - Favs: 5 - Follows: 8 - Updated: 2/21 - Published: 12/20/2012 - Chell, Mary, Garry
TOD dr who portal by 1980-somethingspace-girl reviews
Just read.
Crossover - Doctor Who & Portal - Rated: T - English - Sci-Fi/Humor - Chapters: 3 - Words: 298 - Reviews: 2 - Favs: 1 - Follows: 1 - Updated: 2/17 - Published: 1/4
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