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Between Minds by 3theCaptain reviews
After surviving her battle with GLaDOS, Chell wakes in Aperture Science and makes another escape attempt. Meanwhile, after his ordeals through City 17, Gordon wakes at White Forest and tries to recover the Borealis and Judith Mossman... Or at least, that was the plan. The unexpected throws Chell, Gordon, Alyx, and Barney down paths toward inevitable consequences.
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Drama - Chapters: 11 - Words: 86,450 - Reviews: 66 - Favs: 89 - Follows: 136 - Updated: 9/2 - Published: 10/15/2011 - Alyx V., Gordon F., Barney C., Chell
Mentality by Macose Brok reviews
3 kids wake up in an office and they try to escape a bizarre world.
Crossover - Portal & Stanley Parable - Rated: T - English - Adventure/Fantasy - Chapters: 21 - Words: 6,618 - Reviews: 1 - Updated: 8/28 - Published: 6/23 - GLaDOS, OC, Narrator
Half-LifePortal Crossover by LeBonnieBunny reviews
Just a one-shot crossover (is it?) of HL2/3 and Portal
Crossover - Half-Life & Portal - Rated: K - English - Adventure - Chapters: 1 - Words: 480 - Reviews: 1 - Published: 8/26 - Alyx V.
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: 20 - Words: 13,285 - Reviews: 4 - Favs: 1 - Follows: 3 - Updated: 8/25 - Published: 5/5 - Wilson H., Willow
Compy: Chrono Convergence by GingerFloof26 reviews
The third installment in the "Compy" series. GLaDOS, now known as Compy, sends the Borealis to her old ally, Lucca Ashtear. But when the Combine steal the Frozen Flame of Chronopolis, will it be an opportunity to make amends with her past, or will it doom all their worlds to destruction?
Crossover - Chrono Trigger & Portal - Rated: T - English - Romance/Sci-Fi - Chapters: 14 - Words: 21,345 - Reviews: 6 - Updated: 8/25 - Published: 4/27
Zombification Order by redsquidz
GLaDOS has a new set of tests to run - namely, seeing how the portal gun can be used alongside actual weaponry in the event of a zombie outbreak. She's combined several testing chambers into one large testing arena and, much to Chell's annoyance, released swarms of zombified scientists (looks like all those corpses from the neurotoxin event came in handy!).
Crossover - Call of Duty & Portal - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 3,047 - Published: 8/19 - Tank D., Dr. Richtofen, Chell
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: 51 - Words: 349,181 - Reviews: 73 - Favs: 69 - Follows: 67 - Updated: 8/14 - Published: 2/17/2012 - Dragonborn/Dovahkiin, D. Rattmann, Wheatley, Chell
Project Memento - Storyline A 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 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: 3 - Words: 7,173 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 8/11 - Published: 3/24 - Axl, X, Zero, Wheatley
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: 3 - Words: 7,299 - Reviews: 7 - Favs: 2 - Follows: 2 - Updated: 8/11 - Published: 3/14 - Axl, X, Zero, GLaDOS
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: 3 - Words: 7,139 - Reviews: 4 - Favs: 2 - Follows: 2 - Updated: 8/11 - Published: 3/16 - Axl, X, Zero, GLaDOS
There Will Be Cake by Thief of Dreams reviews
Radiant Garden has upgraded its computer systems with a supposedly more advanced machine. But when it starts malfunctioning, Sora, Donald, and Goofy are sent to the Aperture Science Enrichment Center, where they become test subjects.
Crossover - Kingdom Hearts & Portal - Rated: K+ - English - Humor/Sci-Fi - Chapters: 5 - Words: 18,835 - Reviews: 52 - Favs: 55 - Follows: 44 - Updated: 8/10 - Published: 12/28/2009 - Sora, Donald Duck, Goofy, GLaDOS
Rusted Hooves by theponywhounicorn reviews
When Pinkie finds herself a metal eye? in her favourite glade, she takes it to twilight and and begins to learn his past, but with time will she decide she didn't want to know this moronic but adorable core? cover by crescent mond: bubble wheatly.
Crossover - My Little Pony & Portal - Rated: K - English - Humor/Hurt/Comfort - Chapters: 2 - Words: 387 - Reviews: 1 - Favs: 2 - Follows: 3 - Updated: 8/10 - Published: 8/4 - Twilight Sparkle, Pinkie Pie, Wheatley
Into the Fire by cmpmatthews reviews
When the Doctor and Donna land in the Enrichment Center of Aperture Science after 30 years of silence, they decide to explore. Little do they know that they are about to be tested to the max by a lonely, bored AI that had been dormant for 30 years prior.
Crossover - Doctor Who & Portal - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 1,885 - Reviews: 7 - Favs: 7 - Follows: 10 - Updated: 8/4 - Published: 11/26/2013 - 10th Doctor, Donna N., GLaDOS, Weighted Companion Cube
How To Train Your Hiccup- Why No One Wants Hiccup as a Test Subject by TreenBeen
Glad0s thinks she's found a great new test subject. She's wrong. She's got a crazy viking inventor on her hands.
Crossover - Portal & How to Train Your Dragon - Rated: K+ - English - Humor - Chapters: 1 - Words: 1,038 - Favs: 4 - Follows: 1 - Published: 8/2 - GLaDOS, Hiccup - Complete
The Aperture Science Enhanced Enrichment Apparatus by Order of The Fourth Wall
Kazuto and Asuna get a strange letter from a company named Aperture regarding some old helmets found in a landfill.
Crossover - Portal & Sword Art Online/ソードアート・オンライン - Rated: T - English - Sci-Fi - Chapters: 7 - Words: 7,385 - Favs: 1 - Follows: 1 - Updated: 8/2 - Published: 7/10 - GLaDOS, Wheatley, Kirito/Kazuto K., Asuna/Asuna Y.
1920s Portal x Half Life by talietikasero
A 1920s double AU in which Aperture and Black Mesa are rival crime organizations, headed by Caroline and Breen respectively, and a night out turns into something unexpected
Crossover - Half-Life & Portal - Rated: K - English - Chapters: 7 - Words: 21,002 - Favs: 1 - Follows: 1 - Updated: 7/30 - Published: 8/25/2014 - Gordon F., Caroline, Chell
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: 3 - Words: 12,425 - Reviews: 11 - Favs: 10 - Follows: 11 - Updated: 7/29 - Published: 3/27 - Chell, GLaDOS, Wheatley
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: 19 - Words: 126,058 - Reviews: 93 - Favs: 64 - Follows: 84 - Updated: 7/23 - Published: 8/6/2013 - Dib, Zim, Wheatley, GLaDOS
Aimless by cacy11
Wheatley, Rick and the Space Core float across the mining ship Red Dwarf and are brought aboard by the crew. Set after Portal 2 and Red Dwarf series 10.
Crossover - Red Dwarf & Portal - Rated: T - English - Chapters: 1 - Words: 746 - Published: 7/21 - Lister, D., Rimmer, A., Wheatley, Space Core
Aperture: Mercenaries Turned Subjects by Sheppard Studios reviews
"Cave here. We abducted two giant human looking animal creatures from some foreign system, and we're gonna stick them into a few test chambers to see what happens. I've been informed that they shouldn't be in the same room or they'll try and kill each other, but that came from the lab-boys and what do they know? We're just throwing science at the wall to see what sticks."
Crossover - Star Fox & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 2,778 - Reviews: 6 - Favs: 3 - Follows: 7 - Published: 7/11 - Fox M., Wolf O'D., Cave Johnson
Five Nights at Aperture by hyacinthorectus reviews
A long time ago, Freddy and his gang of mascots were hired to entertain the children in Bring Your Daughter to Work Day. Now, the animals are back for revenge. Will GLaDOS and Chell survive the night?
Crossover - Portal & Five Nights at Freddy´s - Rated: K+ - English - Mystery/Horror - Chapters: 4 - Words: 8,259 - Reviews: 17 - Favs: 24 - Follows: 35 - Updated: 7/5 - Published: 8/29/2014 - Chell, GLaDOS
Cretacious Universe by Tesla Defense Blagger
Alexander Tesla appears on an island with no memory of who he is. He tries to find the other people, and succeeds, but only after 5 years does he discover the truth. And when he does? This story is mainly of survival, sci-fy, and a few dating scenes. Tesla Defense's advanced AI technology plays a very large role, being a main character.
Crossover - Jurassic Park & Portal - Rated: T - English - Sci-Fi/Romance - Chapters: 1 - Words: 482 - Published: 7/1
Winds of Change by du911
My hand at a time travel fic! What do you get when you mix a hyperactive blonde, two time-lost parents, and an idiot savant that keeps blowing things up?...It won't end well; I'll tell you that much! Inspired by Hektol!
Crossover - Naruto & Portal - Rated: T - English - Sci-Fi/Supernatural - Chapters: 1 - Words: 203 - Follows: 1 - Published: 7/1 - [Hinata H., Naruto U.] Cave Johnson
My little Pony Friendship is Portals by Golden Light 001 reviews
Chell after finally escaping Aperture Science Fines herself in a clearing in the Everfree Forest after getting to the edge of the forest she get a surprise that she never expected. P.S. Please do not complain about the companion cube with a dead person in it thank you. Minor cussing or major cussing. Up For Adoption!
Crossover - My Little Pony & Portal - Rated: T - English - Adventure/Friendship - Chapters: 7 - Words: 2,640 - Reviews: 10 - Favs: 8 - Follows: 10 - Updated: 6/30 - Published: 4/30/2014 - Fluttershy, Rainbow Dash, Twilight Sparkle, Chell
The New Story by PixelsShattered reviews
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: 7 - Words: 5,473 - Reviews: 3 - Favs: 3 - Follows: 1 - Updated: 6/30 - Published: 2/22 - Chell, Weighted Companion Cube, Stanley, Narrator - Complete
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