It only takes a single disharmonious element to throw off the entire composition. Fifty years before Robert Baratheon was to ascend the Iron Throne, Westeros receives one hell of a bad musician. Harry never did care about any player other than himself.

Fifth year: After the Dementor attack, Harry is not returning to Hogwarts – is he? ! Instead of Harry, a snake moves into the lions' den. People won't know what hit them when Dumbledore's chess pawn Harry is lost in time… Manipulative Dumbledore, 'Slytherin!Harry', Time Travel!

Harry Potter is not standing up in his crib when the Killing Curse strikes him, and the cursed scar has far more terrible consequences. But some souls will not be broken by horrible circumstance. Some people won't let the world drag them down. Strong men rise from such beginnings, and powerful gifts can be gained in terrible curses. (HP/HG, Scientist!Harry)

A different upbringing leaves Harry Potter with an early knowledge of magic and a view towards the Wizarding World not as an escape from the Dursleys, but as an opportunity to learn more about it. Unfortunately, he quickly finds that there are many elements in this new world that are unwilling to leave the Boy-Who-Lived alone.

After one taunt too many by Draco & learning of dark things while possessed, Harry refuses to play his part anymore. Into this comes Luna with her own dark story to tell. They shall both get revenge and shake magical Britain before the end. - Harry/Multi

The escape of Peter Pettigrew leaves a deeper mark on his character than anyone expected, then comes the Goblet of Fire and the chance of a quiet year to improve himself, but Harry Potter and the Quiet Revision Year was never going to last long. A more mature, darker Harry, bearing the effects of 11 years of virtual solitude. GoF AU. There will be romance... eventually.

A young Harry Potter, abandoned on the streets, is taken in by a man with a mysterious motive. When his new muggle tattoo suddenly animates, he is soon learning forbidden magic and planning to infiltrate the wizarding world on behalf of the "ordinary" people. But nothing is ever that black and white. (Runes, Blood Magic, Parseltongue, Slytherin!Harry) (SEE NOTE 1st Chapter)

He stepped into a world he didn't understand, following footprints he could not see, toward a destiny he could never imagine. How can one boy make a world brighter when it is so very dark to begin with? A completely AU Harry Potter universe.

Voldemort didn't just give Harry some of his powers that night. He gave him all of his memories. With them, his allies and friends, Harry shall change the Wizarding World like no one ever before. LightHarry. GoodDumbledore. Chaotic magic. COMPLETE!

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.