Suppose Tom Riddle never bothers to show mercy, and Harry Potter dies with his parents? What would that mean for the world, to have no Boy-Who-Lived to save them? ("A couple of stubborn kids" just doesn't have the same ring to it.)

Harry James Potter, the Boy-Who-Lived, the Defeater of Voldemort, Chief Auror, Master of Death, finds that he is five years old. It should not surprise anyone that things in Magical Britain immediately become rather strange.

Earth Bet was defined by the presence of the Endbringers. Cities were destroyed, nations fell. Laws and treaties were written, all to allow the world to survive their presence. But what if they never existed, something else taking their place? Monsters from another world. What consequences might it have for the heroes and villains trying to live their lives in the shadow of giants?

AU. Harry, Ron, and Ginny send themselves back in time to avoid the destruction of everything they hold dear, and the deaths of everyone they love.

This is the companion novel to Backward With Purpose. I'd read that one first. This story is complete; the sequel has begun.

AU. Voldemort kills Dumbledore but is defeated by a child. In the aftermath, Snape becomes the Headmaster and radically changes Hogwarts. Harry Potter of House Slytherin begins his Third Year at Hogwarts Battle School and realizes that friend and foe are too similar for his liking. Competing with allies and enemies, Harry finds there is a cost to winning.

Luckily, lazy came up in Petunia's tirades slightly more often than freak, otherwise, this could have been a very different story. AU. Not your usual Hufflepuff!Harry story.

Sequel - Read the others first, of course. Lazy!harry is back for another year of doing nothing. This will not be a long story. Sorry for the wait.

... How I Learned to Stop Worrying and Love the Cruciatus. Albus Dumbledore always worried about the parallels between Harry Potter and Tom Riddle. But let's be honest, Harry never really had the drive to be the next dark lord. Of course, things may have turned out quite differently if one of the other muggle-raised Gryffindors wound up in Slytherin instead.

(Continuation of Harry Potter and the Methods of Rationality by Less Wrong) Still reeling from Lucius' Death and Narcissa's rebirth, Draco struggles to find his place in a changing Hogwarts and learns a dark secret of his new room-mate: Harry James Potter-Evans-Verres.

(Continuation of Harry Potter and the Methods of Rationality) It's easy to make big plans and ask big questions, but harder to follow them through. Find out what happens to Harry Potter-Evans-Verres, Hermione, Draco, and everyone else once they grow into their roles as leaders, leave the shelter of Hogwarts, and venture out into a wider world. Permanent home: anarchyishyperbole com

Deep breath, count to ten, and let's talk like adults.

This is designed to start after chapter 102 of Eliezer Yudkowsky's "Harry Potter and the methods of rationality" (google hpmor). It was written by a fan waiting impatiently (but constructively) for the story to be finished. Read it before this. As usual, characters are owned by Rowling or Yudkowsky. Update: added vignette at end.

A series of short flashes, set in the months and years after the events of Following the Phoenix.

Hermione grows up as a maths whiz instead of a bookworm and tests into Arithmancy in her first year. With the help of her friends and Professor Vector, she puts her superhuman spellcrafting skills to good use in the fight against Voldemort. Years 1-4. Sequel posted.

A single-/dual-point-of-departure spinoff from Less Wrong's brilliant story "Harry Potter and the Methods of Rationality", branching away in Chapter 81. Hermione is sent to Azkaban, but Harry is not about to give up. Unfortunately, it doesn't look like his enemy is about to leave things alone either.

Most self-inserts are exercises in vanity, and nothing says 'vanity' quite like Gilderoy Lockhart. But with a new personality and knowledge of the future, who knows? Maybe Lockhart will turn out to be a useful DADA teacher after all.

A Memorable History of Magic, comprising all the parts you can remember from Binns and Bagshot, including 103 Goblin Rebellions, 5 Chocolate Frog Cards, and 2 Genuine Facts. A companion piece to "Magical Me," inspired by my 'Map of Magical Europe.'

An extension of the universe of "Harry Potter and the Methods of Rationality". Includes scenes that should have been but weren't. They contribute nothing to the plot or explaining the universe, but answer important questions that may otherwise never be answered.

[COMPLETE] A metafic of hezzel's fic, 'Following the Phoenix', which is in turn a fic of 'Harry Potter and the Methods of Rationality'. Squiring the Phoenix picks up from where 'Following the Phoenix' leaves off and shows what happens next.

A fan epilogue to LessWrong's modern epic Harry Potter and the Methods of Rationality, going into why the most popular fan theory was so popular.

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.

Variation of Chapter 14 of Eliezar Yudkowsky's Harry Potter and the Methods of Rationality. Because, really, McGonagall is smarter than that.

The presence of a foreign soul may have unexpected side effects on a growing child. I am Lord Volde...Harry Potter. I'm Harry Potter. In which Harry is insane, Hermione is a Dark Lady-in-training, Ginny is a minion, and Ron is confused.

Tom Riddle was able to use magic long before he received a wand. In this AU, Harry has the same grasp on his magic...and a hatred for Muggles... Watch the birth of evil. Smart!Dark!Evil!Harry, All 7 Years

Harry Potter loves, and is loved by, his parents, his godfather, and his brother. He isn’t mistreated, abused, or neglected. So why is he a Dark Wizard? NonBWL!Harry. Not your typical Harry’s brother is the Boy Who Lived story.

The year is 1934, and Superman has arrived in Metropolis. Features Lex Luthor as the villain protagonist as he comes to grips with the arrival of an alien god. Occasional point-of-view chapters/sections featuring Lois Lane. Takes place outside any established comics continuity. Complete.

Points of divergence in the Harry Potter universe. Those moments where someone really ought to have taken a step back and asked, "Wait, what?" An ongoing collection of one-shots. Episode 16: Why I Like You.

Points of divergence from the world envisioned by 'Magical Me.' This is a collection of the shorts and semi-random snippets that could have turned my self-insert fic into a very different sort of story. Episode 1: The April Fool's Day Omake.

Recursive fanfic of Harry Potter and the Methods of Rationality by Eliezer Yudkowsky. Fits in around chapter 94, and contains major spoilers. Harry Potter starts to come around to the idea that souls might exist.

Kyle Reese has traveled backwards in time, not to save Sarah Connor, but to help her rewrite the faulty utility function of Skynet. Together, it's possible that they might avert Judgment Day and save the world from nuclear Armageddon - and hopefully create a utopia ruled over by an AI god in the process. Fully completed. Diverges wildly from canon.

Harry is a prisoner, and Bellatrix has fallen from grace. The accidental activation of Bella's treasured heirloom results in another chance for Harry. It also gives him the opportunity to make the acquaintance of the young and enigmatic Bellatrix Black as they change the course of history.

Harry and Hermione are gifted a handwritten book at the beginning of Fourth Year. A book that reveals horrible truths about the world they live in. Prepare for a tougher Harry and a battle focused on the Ministry.

Nothing is as it seems on the path to power. Bodies and conspiracies litter the road as daggers shine in the air. Treacheries centuries old leave the place to decade long plans that are just now coming to fruition, and Harry Dursley questions himself through a journey that shall lead him to drastically change his perception of the world. It's all a matter of perspective, after all.

More points of divergence in the Harry Potter universe. These are those plot elements that, in the hands of a different author, could have driven the canon story-line right off the rails. An ongoing collection of one-shots. Episode 1: The Royal Wizard.

While Batman searches for the Joker, Dexter Morgan starts cleaning up Gotham City in his own way.

Alexandra Quick is determined to cheat her fate and see justice done, but she faces a vengeful conspiracy and secrets she is not prepared for. She'll need the help of her friends, but even that may not be enough against the power of the Stars Above.

Lazy!Harry is back, and not doing very much at all...

A take on rationalist Harry.

You still dream of Azkaban, sometimes. A probably AU fic about the Aurors set in LessWrong's Harry Potter and the Methods of Rationality. DO NOT READ unless you've read up to at least Chapter 56; contains major spoilers.

Someone messed with Luthor's mind. Someone was going to pay. A mystery that slowly unveils a terrible secret within the DCU and Lex's response to what he finds. Now complete!

Harry recalls that a pale little girl called Sally-Anne was sorted into Hufflepuff during his first year, but no one else remembers her. Was there really a Sally-Anne? Harry and Hermione set out to solve the chilling mystery of the lost Hogwarts student.

Alexandra Quick begins eighth grade at Charmbridge Academy angry and in denial. When guilt and obsession lead her to a fateful choice, it is not only her own life that hangs in the balance, for she will uncover the secret of the Deathly Regiment!

Hufflepuff is the house of the leftovers, the losers, the forgotten. Well, Tom Riddle thinks, it's time to change that.

Albus Dumbledore attempts to drop Harry Potter off with the Dursley family when things go terribly wrong. The whole universe shifts because of one man's action.

Seventh grader Alexandra Quick returns to Charmbridge Academy. This year she will face bullies from another wizarding school, a secret Dark Arts club, and her father's scheming, but her most terrible trials await her in the strange and deadly Lands Below!

Harry Potter has an unprecedented amount of freedom the summer before his Third Year. He stumbles into an odd shop in Diagon Alley that will change his life forever.

The war is over, and all is well, they say, but the wounds remain unhealed. Bitterness divides the Houses of Hogwarts. Can the first children born since the war's end begin a new era, or will the enmities of their parents be their permanent legacy?

COMPLETE. Two years after defeating Voldemort, Harry falls into an alternate dimension with his godfather. Together, they embark on a new life filled with drunken debauchery, thievery, and generally antagonizing all their old family, friends, and enemies.

The war against Voldemort never reached America, but all is not well there. When 11-year-old Alexandra Quick learns she is a witch, she is plunged into a world of prejudices, intrigue, and danger. Who wants Alexandra dead, and why?

In Goblet of Fire, JKR established that it was absurdly easy to bind other witches and wizards unwillingly into binding magical contracts with a simple, school-taught 'confundus' charm. What if Harry took note of that and decided to do something about it?

Smarter Voldemort launches his conquest of Britain immediately after his resurrection. Smarter Harry, Sirius, and co. are the only ones who can stop him. Unconventional tactics. Begins after Harry’s 4th year at Hogwarts.

ABANDONED. Two years after the Death Hallows Epilogue, tragedy strikes Harry Potter and his family. The only way to set things right is to journey back to the time before he was born. Not for Ginny enthusiasts. Time Travel. Avenging!Harry.

With all the crappy stuff Harry goes through at Hogwarts, the smart money would be on him transferring to a different, better school early in his career. Here’s one way it might have happened. No planned pairings.

AU of Year One. The Dursleys have done one good thing for Harry Potter’s continued safety: their neglect has made him suspicious, sneaky, and cruel. A brief explanation of how things might have gone differently. Includes DH spoilers. Amoral!Harry.

Harry finds a way to get motivated, really, really motivated. A super!Harry oneshot. Post HBP, AU, No DH.