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The Universe Is An Optimisation Problem
by notasentientantcolony reviews
A weird pre-apocalyptic reimagining of Harry Potter and the Methods of Rationality in a retrofuturist AU with parallel universes, megacorporations, high magic, Cold War wizardry, and AI. "I've never been more confused or entertained in my life." - MurtGastin. "The world of Harry Potter feels magical again. Without feeling childish." - Guest. Updates every three Wednesdays!
Harry Potter - Rated: T - English - Drama/Mystery - Chapters: 7 - Words: 59,313 - Reviews: 29 - Favs: 62 - Follows: 113 - Updated: 6/12 - Published: 12/31/2016 - Harry P., Hermione G., Draco M., OC
Potter Who and the Wossname's Thingummy
by ForrestUUID reviews
No TARDIS, no screwdriver, and no memory — on the plus side, an owl and a wand! May or may not be AU. "It's all in the mind, you know."
Crossover - Doctor Who & Harry Potter - Rated: K+ - English - Humor/Mystery - Chapters: 37 - Words: 211,900 - Reviews: 704 - Favs: 1,224 - Follows: 1,251 - Updated: 10/14/2017 - Published: 8/31/2012 - 11th Doctor, Harry P.
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: 34287 - Favs: 23,007 - Follows: 17,502 - Updated: 3/14/2015 - Published: 2/28/2010 - Harry P., Hermione G. - Complete
10 Billion Years
by andyjay18 reviews
All she wanted was to bring water to the desert.
Crossover - Now and Then, Here and There & Puella Magi Madoka Magica/魔法少女まどか★マギカ - Rated: K+ - English - Drama - Chapters: 1 - Words: 3,977 - Reviews: 3 - Favs: 10 - Published: 12/21/2013 - Complete
Chanson de Geste
by LVDB reviews
Edmund's memoirs reveal a darker Narnia than the one Professor Lewis described...
Chronicles of Narnia - Rated: T - English - Chapters: 26 - Words: 68,131 - Reviews: 136 - Favs: 175 - Follows: 100 - Updated: 9/17/2011 - Published: 12/27/2009
by Cytrus reviews
Kyuubey basked in the light and wondered if this was really all right.
Puella Magi Madoka Magica/魔法少女まどか★マギカ - Rated: T - English - Chapters: 1 - Words: 409 - Reviews: 6 - Favs: 31 - Follows: 5 - Published: 3/23/2011 - Madoka K., Kyubey - Complete
A Trail a Mile Wide
by Heuksal reviews
Shepard didn't get much of a chance to celebrate after ruining Sovereign's day, and the SR2's crew could really use a break after the end of ME2. Minor postgame spoilers, Femshep and Garrus, mostly dialog, gratuitous nerdy in-jokes.
Mass Effect - Rated: T - English - Humor - Chapters: 1 - Words: 1,685 - Reviews: 102 - Favs: 652 - Follows: 89 - Published: 2/12/2010 - Shepard (F), Garrus V. - Complete
The Finale of the Ultimate Meta Mega Crossover
by EliezerYudkowsky reviews
Vernor Vinge x Greg Egan crackfic. This was supposed to be a bit of utterly deranged fun, but got out of control and ended up as a deep philosophical exploration.
X-overs - Rated: M - English - Sci-Fi/Humor - Chapters: 3 - Words: 13,500 - Reviews: 43 - Favs: 78 - Follows: 31 - Published: 9/20/2009 - Complete