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Harry Potter and the Methods of Rationality
by Less Wrong reviews
Petunia married a biochemist, and Harry grew up reading science and science fiction. Then came the Hogwarts letter, and a world of intriguing new possibilities to exploit. And new friends, like Hermione Granger, and Professor McGonagall, and Professor Quirrell... COMPLETE.
Harry Potter - Rated: T - English - Drama/Humor - Chapters: 122 - Words: 661,619 - Reviews: 29668 - Favs: 15,858 - Follows: 14,275 - Updated: 3/14 - Published: 2/28/2010 - Harry P., Hermione G. - Complete
The Wizard and the Lonely Princess
by Harry Leferts reviews
We all have imaginary friends when we're young right? Well, as it turns out, Harry's might not be all that imaginary at all... Chapters 9-11Rewritten. Story Complete.
Crossover - Harry Potter & My Little Pony - Rated: K+ - English - Hurt/Comfort/Friendship - Chapters: 32 - Words: 155,306 - Reviews: 1486 - Favs: 1,788 - Follows: 1,764 - Updated: 3/10 - Published: 7/20/2011 - Harry P., Princess Luna/Nightmare Moon - Complete
A Drop of Poison
by Angel of Snapdragons reviews
WIP An unconscious Iruka forces Naruto to return to the academy for another year. It also marks the beginnings of a prank whose far-reaching consequences will shake Konoha to its foundations.
Naruto - Rated: T - English - Humor - Chapters: 20 - Words: 114,082 - Reviews: 4275 - Favs: 7,163 - Follows: 7,817 - Updated: 3/1 - Published: 10/3/2008 - Naruto U., Iruka U.
Harry Potter and the Natural 20
by Sir Poley reviews
Milo, a genre-savvy D&D Wizard and Adventurer Extraordinaire is forced to attend Hogwarts, and soon finds himself plunged into a new adventure of magic, mad old Wizards, metagaming, misunderstandings, and munchkinry. Updates Fridays.
Crossover - Harry Potter & Dungeons and Dragons - Rated: T - English - Chapters: 72 - Words: 301,307 - Reviews: 5192 - Favs: 3,602 - Follows: 4,140 - Updated: 2/27 - Published: 5/7/2012
A Third Path to the Future
by Vimesenthusiast reviews
Rescued from the Negative Zone by the Fantastic Four, Harry Potter discovers he is a mutant and decides to take up the cause of equality between mutants and humans (among other causes). How will a dimensionally displaced Harry Potter, one who is extremely intelligent, proactive and not afraid to get his hands dirty effect the marvel universe? Pairings: Harry/Jean/Ororo/others pos.
Crossover - Harry Potter & Marvel - Rated: M - English - Adventure/Romance - Chapters: 22 - Words: 879,740 - Reviews: 2846 - Favs: 4,322 - Follows: 4,295 - Updated: 2/25 - Published: 6/30/2013 - Harry P.
Child of the Storm
by Nimbus Llewelyn reviews
New Mexico was not the first time Thor had been a mortal. It was only a refinement of the technique. What if James Potter had been Thor, incarnated as a memoryless newborn? On his death, Odin removed his memories as James, due to grief. In Harry's Third Year, a (mostly) reformed Loki restores them. Harry now has a father, a family and a heritage that is going to change the world.
Crossover - Harry Potter & Avengers - Rated: T - English - Adventure/Drama - Chapters: 63 - Words: 578,598 - Reviews: 5231 - Favs: 4,329 - Follows: 4,994 - Updated: 2/21 - Published: 1/11/2013 - Harry P., Thor
A Technological Singularity
by 6thfloormadness reviews
AU. How did the Borg Collective come to be? What if the Systems Alliance had the Borg as allies during The First Contact War?
Crossover - StarTrek: Voyager & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 21 - Words: 119,339 - Reviews: 439 - Favs: 504 - Follows: 574 - Updated: 2/7 - Published: 10/3/2011
Harry Lokison the Trickster's Heir
by dglsprincess105 reviews
A Marvel What If continuity: How things would have been different if Odin had placed Loki in the mortal body of James Potter? hey everyone! I'm alive!
Crossover - Harry Potter & Thor - Rated: K+ - English - Family/Humor - Chapters: 12 - Words: 125,872 - Reviews: 1032 - Favs: 2,734 - Follows: 2,923 - Updated: 12/13/2014 - Published: 5/21/2011 - Harry P., Loki L.
by nuhuh reviews
It all goes wrong when Dumbledore gives Harry the choice to go back and fight Voldemort or move on. Harry is taken before he can make that choice and is thrown in an unexpected afterlife. Now he is on a mission to fight his way back to his own world.
Crossover - Harry Potter & Bleach - Rated: M - English - Adventure/Mystery - Chapters: 13 - Words: 106,637 - Reviews: 1216 - Favs: 2,887 - Follows: 2,960 - Updated: 11/18/2014 - Published: 11/28/2009 - Harry P., R. Unohana
Walking in the shadows
by dogbertcarroll reviews
Xander's road trip takes him much farther then he ever dreamed possible.
Buffy: The Vampire Slayer - Rated: M - English - Adventure/Supernatural - Chapters: 30 - Words: 77,938 - Reviews: 1115 - Favs: 1,393 - Follows: 1,293 - Updated: 10/29/2014 - Published: 9/9/2007 - Xander H.
by Muppetz540 reviews
The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it?
My Little Pony - Rated: T - English - Sci-Fi/Suspense - Chapters: 15 - Words: 147,415 - Reviews: 114 - Favs: 183 - Follows: 200 - Updated: 9/2/2014 - Published: 12/2/2011 - Princess Celestia, Princess Luna/Nightmare Moon
My Wish Order Brother
by PiperDreamer reviews
Naruto, after seeing a child get defended by his older brother, makes a wish on a wishing star for an older brother too. What he got was a girly looking art freak with mouths on his hands. Updates are slow, and grammar is not perfect but it is mostly legible.
Naruto - Rated: M - English - Chapters: 34 - Words: 199,165 - Reviews: 2679 - Favs: 2,833 - Follows: 2,484 - Updated: 8/18/2014 - Published: 4/7/2009 - Naruto U., Deidara
by Greylle reviews
a story by myself and Kender Sci which takes place in a timeline which has been completely SNAFUed but oddly works.
Crossover - Stargate: SG-1 & Ranma - Rated: T - English - Sci-Fi/Fantasy - Chapters: 40 - Words: 381,813 - Reviews: 468 - Favs: 637 - Follows: 517 - Updated: 5/18/2014 - Published: 3/28/2010 - Ranma
Wand and Shield
by Morta's Priest reviews
The world is breaking; war and technology are pushing on the edge of the unbelievable, and S.H.I.E.L.D. desperately attempts to keep the peace. The soldier and the scientist are not the only lights that push back against the darkness, however; magic will encompass the world again as the last wizard makes himself known.
Crossover - Harry Potter & Avengers - Rated: T - English - Adventure/Supernatural - Chapters: 32 - Words: 252,192 - Reviews: 6162 - Favs: 9,814 - Follows: 11,263 - Updated: 5/10/2014 - Published: 6/2/2012 - Harry P.
by Slayer Anderson reviews
So...the Fentons punch a hole through to the afterlife in their basement and develop unparalleled hover technology and...they're crackpots? Being taken seriously can be good...and bad, especially if you attract the notice of Howard Stark, S.H.I.E.L.D, A.I.M, and a host of other agencies. Suddenly, the Fentons have to contend with a world wider and stranger than they ever imagined.
Crossover - Marvel & Danny Phantom - Rated: T - English - Adventure/Supernatural - Chapters: 7 - Words: 74,340 - Reviews: 432 - Favs: 770 - Follows: 724 - Updated: 4/26/2014 - Published: 4/18/2013 - Danny F.
Of Wands and Kunai
by Womgi reviews
A 7 year old Harry stumbles on a box of old Naruto manga. Inspired, he reaches deep within, using chakra to quickly become a phenomenal ninja. And thus begins a curious tale. Read and see how it ends! Read 1st chapter A/N...story is officially abandoned.
Crossover - Harry Potter & Naruto - Rated: T - English - Adventure/Drama - Chapters: 19 - Words: 154,743 - Reviews: 1229 - Favs: 2,396 - Follows: 2,289 - Updated: 4/25/2014 - Published: 3/26/2010 - Harry P.
by dogbertcarroll reviews
YAHF Xander creates his own character from a bunch of partial New Mutants' outfits, but what happens when the spell ends?
Crossover - Buffy: The Vampire Slayer & Marvel - Rated: T - English - Humor/Adventure - Chapters: 12 - Words: 35,413 - Reviews: 326 - Favs: 879 - Follows: 792 - Updated: 3/25/2014 - Published: 7/27/2010 - Xander H.
The Laughing Fox
by Lord Dragon Claw reviews
What if Naruto were to be raised by the Joker? Such an idea is so wrong, and yet so right. Not to be taken too seriously.
Crossover - Naruto & Justice League - Rated: T - English - Adventure/Humor - Chapters: 19 - Words: 78,908 - Reviews: 1484 - Favs: 2,752 - Follows: 2,438 - Updated: 3/18/2014 - Published: 6/1/2007 - Naruto U., Joker
How to Win Friends, Influence People
by sparrowette reviews
And Start Your Very Own Secret Ninja Organization. Three months into Naruto's training trip Jiraiya must leave him behind to go to check on a situation in Iwa, leaving Naruto to his own devices. Naruto thinks everything he did makes perfect sense, Kiri thinks he is a cult leader and Tsunade thinks she doesn't get paid enough to deal with this. 100 drabbles format.
Naruto - Rated: K - English - Humor/Adventure - Chapters: 21 - Words: 88,776 - Reviews: 1400 - Favs: 4,161 - Follows: 2,831 - Updated: 12/29/2013 - Published: 7/16/2012 - Naruto U. - Complete
And the Meek Shall Inherit the Galaxy
by Full-Paragon reviews
Due to a shift in turian and quarian patrols, first contact for humanity is friendly; Rael'Zorah and Hannah Shepard become friends, as do their species. But the galaxy is not a safe place, and schisms develop when the Council steps in. As humanity finds new allies among the stars, something darker stirs. The Meek must beware, for it is nearly harvest time. AU, lots of worldbuilding
Mass Effect - Rated: T - English - Sci-Fi/Family - Chapters: 49 - Words: 232,286 - Reviews: 3421 - Favs: 2,261 - Follows: 1,930 - Updated: 11/16/2013 - Published: 3/31/2013 - Tali'Zorah, Shepard (M), Hannah S., Rael'Zorah - Complete
A Spark of Genius
by michaelsuave reviews
Xander Harris was never called a genius, but after a different choice of Halloween costumes he is hit with a 'spark' of mad genius, the abilities that go with it, and flung into a far different world. Come and enjoy the madness. GirlGenius vers costume.
Crossover - Buffy: The Vampire Slayer & Justice League - Rated: M - English - Adventure/Humor - Chapters: 45 - Words: 532,972 - Reviews: 2610 - Favs: 1,772 - Follows: 1,545 - Updated: 5/12/2013 - Published: 10/30/2010 - Xander H.
On the Wings of Dragons
by Bobmin356 reviews
The Weyr prepares for the step of going public against the backdrop of heightening international tensions and increasingly complex personal issues. And is Britain really secure now that the Ministry has been conquered? Sequel to The Queen Who Fell to Earth. Harry/Hr/OCF
Crossover - Harry Potter & Dragonriders of Pern series - Rated: M - English - Drama/Sci-Fi - Chapters: 19 - Words: 365,930 - Reviews: 2132 - Favs: 2,392 - Follows: 1,756 - Updated: 4/7/2013 - Published: 6/5/2012 - Harry P. - Complete
Sleeping With The Girls, Vol II: Chaos Theory
by Admiral-Tigerclaw reviews
The experiment continues. What are the side effects of one's pressence if you give it a little time to percolate? Think you can call the shots?
Crossover - X-overs & Anime X-overs - Rated: T - English - Sci-Fi/Humor - Chapters: 27 - Words: 252,989 - Reviews: 673 - Favs: 961 - Follows: 936 - Updated: 3/22/2013 - Published: 6/14/2010
Never Let Go
by Ruinous Crow reviews
Stuck in Konoha, all Edward Elric wants is to get back to Amestris. But when he forms unlikely bonds with Itachi Uchiha and his brother, added to that a crazy kid in orange, will Edward want to leave?
Crossover - Naruto & Fullmetal Alchemist - Rated: T - English - Adventure/Drama - Chapters: 27 - Words: 217,960 - Reviews: 967 - Favs: 1,081 - Follows: 1,101 - Updated: 1/5/2013 - Published: 8/15/2009 - Naruto U., Sasuke U., Itachi U., Edward E.
Partially Kissed Hero
by Perfect Lionheart reviews
Summer before third year Harry has a life changing experience, and a close encounter with a dementor ends with him absorbing the horcrux within him. Features Harry with a backbone.
Harry Potter - Rated: T - English - Fantasy/Humor - Chapters: 103 - Words: 483,646 - Reviews: 14691 - Favs: 7,676 - Follows: 6,823 - Updated: 4/28/2012 - Published: 5/6/2008 - Harry P.
88 Miles Per Hour
by Perfect Lionheart reviews
Xander dressed as Doc Brown out of Back To The Future and invented a time machine. PTB got tired of him going back to wear costume after costume and kicked him out, beginning a Slider adventure. First stop? Halloween in a canon Buffy-verse.
Crossover - Buffy: The Vampire Slayer & Back to the Future - Rated: K+ - English - Adventure/Humor - Chapters: 10 - Words: 63,417 - Reviews: 465 - Favs: 489 - Follows: 452 - Updated: 2/21/2012 - Published: 6/9/2011 - Xander H.
by Meinos Kaen reviews
As we all know, when the Yondaime sealed the Kyuubi, Konoha should have gotten away from it without any more collateral damage than what it had already incurred in, but... Demons are a malicious bunch. Adopted from Legendary Legacy.
Naruto - Rated: T - English - Humor/Adventure - Chapters: 10 - Words: 81,826 - Reviews: 395 - Favs: 1,041 - Follows: 953 - Updated: 1/22/2012 - Published: 12/12/2010 - Naruto U., Ayame
by ben10987654321 reviews
Clark ends up attending a certain school for the 'gifted'. Smallville/X-Men: Evolution x-over.
Crossover - X-Men: Evolution & Smallville - Rated: T - English - Romance/Adventure - Chapters: 86 - Words: 549,097 - Reviews: 1732 - Favs: 856 - Follows: 499 - Updated: 10/20/2011 - Published: 5/20/2010 - [Rogue/Anna Marie, Clark K./Superman] - Complete
That Most Heinous of Crimes
by Andrew Joshua Talon reviews
Someone else is thrust into the role of Team 7's sensei. Chaos ensues.
Naruto - Rated: M - English - Humor - Chapters: 9 - Words: 51,345 - Reviews: 477 - Favs: 888 - Follows: 856 - Updated: 7/19/2011 - Published: 1/27/2010 - Naruto U., Anko M.
Nature of Power
by Story Weaver1 reviews
AU. What if the Hollow from the first episode was a little faster? What if Ichigo didn't become a shinigami that fateful night? What if Orihime did instead?
Bleach - Rated: K+ - English - Chapters: 13 - Words: 37,341 - Reviews: 67 - Favs: 56 - Follows: 56 - Updated: 7/9/2011 - Published: 6/24/2008 - Orihime I.
Kick in the arse of the Wizarding World
by Alrissa reviews
Hermione life suddenly changes, courtesy of an experiment conducted by herself from an alternate, future universe. You'd think messages from the future would have more then vague hints and a headache. Or was that from fighting the troll. CH1-3 Beta-ed.
Harry Potter - Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 62,575 - Reviews: 339 - Favs: 633 - Follows: 539 - Updated: 6/23/2011 - Published: 2/6/2010 - Hermione G.
Naruto Reborn:Sasuke Uchiha
by Danfiction reviews
HIATUS Even after death, Fate had an offer, and with that offer came a twist,now Naruto is thrown in a world where he never existed, in a body that belonged to the very person who had killed him.Waking from a coma, welcome the new Uchiha. Pairing undecided
Naruto - Rated: T - English - Drama - Chapters: 48 - Words: 351,064 - Reviews: 1539 - Favs: 2,098 - Follows: 1,664 - Updated: 1/3/2011 - Published: 1/17/2008 - Naruto U.
by Slayer Anderson reviews
Danny gets an acceptance notification from a school that he never applied to. I know what you're thinking…green ink, owls, and a castle, right? Sorry, not this time. An attempt at originality towards a worn concept. Rewrite coming soon.
Crossover - Teen Titans & Danny Phantom - Rated: M - English - Drama/Adventure - Chapters: 20 - Words: 120,152 - Reviews: 856 - Favs: 1,039 - Follows: 735 - Updated: 12/31/2010 - Published: 10/6/2009 - Jinx, Danny F. - Complete
by Irritus185 reviews
Long ago the world was full of amazing technology, things ninja could only dream of. For centuries this ancient art was lost. That is until a nosy blonde found it in a dusty tome. Now he follows in their footsteps – those of a mad scientist.
Naruto - Rated: T - English - Humor/Adventure - Chapters: 10 - Words: 134,778 - Reviews: 1251 - Favs: 3,173 - Follows: 2,837 - Updated: 9/26/2010 - Published: 12/15/2008 - Naruto U., Tenten
The Thief of Hogwarts
by bluminous8 reviews
Summary: AU Young Harry learns to steal as he is fed up from his deprivation of his wants and needs by his guardians. A Thief is born in Privet Drive.
Harry Potter - Rated: M - English - Humor/Adventure - Chapters: 19 - Words: 105,046 - Reviews: 3573 - Favs: 7,350 - Follows: 7,118 - Updated: 6/22/2010 - Published: 7/7/2009 - Harry P.
Chunin Exam Day
by Perfect Lionheart reviews
Naruto finds he is flung back in time and must repeat the entire Chunin exam over and over and over, until he gets it right and possibly saves Konoha in the bargain.
Naruto - Rated: T - English - Adventure/Humor - Chapters: 77 - Words: 344,950 - Reviews: 14225 - Favs: 7,214 - Follows: 5,470 - Updated: 5/22/2010 - Published: 12/4/2007 - Naruto U.
by Water Mage reviews
After waking up on an alternate Earth Harry is tested and experimented on. They tried to turn him into a weapon. But he was no ones weapon. Not anymore. Where does he fit in this new world where things and people are a bit more...ultimate. HP/Marvel xover
Harry Potter - Rated: T - English - Adventure - Chapters: 3 - Words: 44,915 - Reviews: 538 - Favs: 1,620 - Follows: 1,934 - Updated: 4/2/2010 - Published: 10/18/2008 - Harry P.
The Open Door
by Academia Nut reviews
There are creatures in the multiverse that should not be allowed beyond their own confines. Unfortunately someone has opened a door that should have remained closed. Thousand Shinji sequel/sidestory
X-overs - Rated: M - English - Chapters: 71 - Words: 230,404 - Reviews: 700 - Favs: 576 - Follows: 421 - Updated: 3/12/2009 - Published: 6/13/2008