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Effects of a Titan by
greeneman42 reviews
A small salvage ship comes across an interesting find while searching. Set before Halo 4 and before ME 2
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 28 - Words: 197,715 - Reviews: 944 - Favs: 1,491 - Follows: 1,962 - Updated: 8/21 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
Mass Effect: The New Journey by
Arashi the Solar Phoenix reviews
During a Joint Deployment, the UNSC Infinity and Her Sangheili allies are suddenly thrown into a new Galaxy, and end up near Charon before the Systems Alliance discovers the Charon Relay. Alliances are forged and how will the galaxy react to an aggressive humanity that not only doesn't use Mass Effect technology, but will not let anyone stand in their way of expansion? AU PreME1
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 190,674 - Reviews: 1324 - Favs: 2,207 - Follows: 2,699 - Updated: 6/11 - Published: 1/26/2014
CatalystEXE by
Shujin1 reviews
She woke up on Ilos as a series of 1s and 0s. An Artificial Intelligence. Mass Effect is the last place a brand new AI wants to be and this one used to be a person. Who knows this should all be a game. Now on Book Two: Rebirth.
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 159,261 - Reviews: 511 - Favs: 1,376 - Follows: 1,637 - Updated: 5/29 - Published: 7/4/2013 - Saren A., Shepard (M), Benezia
Mass Effect: The New Face of War by
ProfFartBurger reviews
It is said that War never Changes; Men do, through the roads they walk, but War does not. The Humans fought The First War, and alongside the Quarians, the Alliance stands tall against the Galaxy in the face of continued adversity. Now Humanity's place is challenged, their power tested, and age-old beliefs are shattered when a beyond-ancient species is forced onto the playing field.
Mass Effect - Rated: T - English - Sci-Fi/Suspense - Chapters: 62 - Words: 539,845 - Reviews: 1321 - Favs: 1,723 - Follows: 1,764 - Updated: 12/30/2018 - Published: 1/26/2014 - Shepard (M), OC - Complete
Harry Potter and the Game by
Concept101 reviews
With his life turned into a Game, Harry now has to raise a Phoenix, uncover the Founders' darkest secrets, deal with political manipulations and live through Hogwarts all while trying desperately to not swear too much.
Harry Potter - Rated: T - English - Adventure/Fantasy - Chapters: 45 - Words: 363,393 - Reviews: 7298 - Favs: 9,782 - Follows: 11,814 - Updated: 7/28/2018 - Published: 5/17/2016 - Harry P., Hermione G., Ginny W., Albus D.
Still Not A Hero by
Soleneus reviews
or Hero 2:Hero Harder I've spent three years preparing for Saren and Sovereign, and now it's time to put the first of my plans into action. All of which involve me, fighting in war. A war against a murderous alien intelligence. A war against impossible odds. A war I put myself right in the middle of...on purpose...I wonder what sanity's like? It must be nice, but it sounds boring.
Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 57 - Words: 307,426 - Reviews: 1383 - Favs: 1,677 - Follows: 1,716 - Updated: 2/14/2018 - Published: 1/17/2015 - Shepard (F), Liara T'Soni, U. Wrex, OC - Complete
Madness Effect by
ZenoNoKyuubi reviews
It's the year 2185CE. Commander Jane Shepard is recruiting members to bring with her on a mission against the Collectors and the Reapers. Among the candidates is Dr. Harry Potter, the reclusive mad scientist who has been missing for twenty years. Who knows what he was doing during that time? Rated M to be sure.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 11 - Words: 81,420 - Reviews: 1411 - Favs: 5,230 - Follows: 6,150 - Updated: 6/4/2017 - Published: 6/10/2015 - Harry P., Shepard (F)
Core Threads by
theaceoffire reviews
A young boy in a dark cupboard is in great pain. An unusual power will allow him to heal himself, help others, and grow strong in a world of magic. Eventual God-like Harry, Unsure of eventual pairings. Alternate Universe, possible universe/dimension traveling in the future.
Harry Potter - Rated: M - English - Adventure/Humor - Chapters: 73 - Words: 376,980 - Reviews: 5569 - Favs: 10,647 - Follows: 11,384 - Updated: 5/28/2017 - Published: 2/22/2014 - Harry P.
The Transmigration Effect by
Twisted Platypus reviews
After I died, I was born again. Is this for a purpose, or an accident? I don't know. But in this new galaxy, I need to survive to find out. Self-Insert of Mass Effect 1. Increasingly AU. Part Three: The Resurrection Effect now up!
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 33 - Words: 216,671 - Reviews: 627 - Favs: 741 - Follows: 618 - Updated: 7/22/2016 - Published: 4/6/2013 - Shepard (F), Garrus V., Liara T'Soni - Complete
You're my Density by
RobSt reviews
Just Suppose Harry hadn't heeded his godfather's advice, and actually lost his temper at his trial? Time travel fic and title is 'Back to the Future' joke.
Harry Potter - Rated: T - English - Chapters: 33 - Words: 237,193 - Reviews: 7362 - Favs: 7,754 - Follows: 6,851 - Updated: 7/9/2016 - Published: 2/9/2015 - [Harry P., Hermione G.] - Complete
Transcendent Humanity by
Solaris242 reviews
Humanity never developed FTL. The Prothean archives contained no technology, no Element Zero, just a warning. Isolated from the rest of the galaxy for two thousand years, restricted to their only system, how will humanity have changed when they first meet the Turians? AU, alternate history of humanity and First Contact.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 18 - Words: 40,604 - Reviews: 2082 - Favs: 6,468 - Follows: 7,482 - Updated: 3/1/2016 - Published: 5/7/2013
Beneath Sovereign Skies by
Bobmin356 reviews
Harry and the dragons fight to find their place and gain acceptance amidst growing international tensions. Not all is well and good as the Weyrs threaten established powers and offer new opportunities. Follow Harry and the dragons as they try to navigate increasingly turbulent waters of international politics, terrorism and intrigue. On indefinite hiatus.
Crossover - Harry Potter & Dragonriders of Pern series - Rated: M - English - Drama/Sci-Fi - Chapters: 15 - Words: 289,842 - Reviews: 1536 - Favs: 2,181 - Follows: 2,039 - Updated: 2/7/2016 - Published: 4/26/2014 - Harry P., Hermione G., OC
Magicks of the Arcane by
Eilyfe reviews
Sometimes, all it takes to rise to greatness is a helping hand and the incentive to survive. Thrust between giants Harry has no choice but become one himself if he wants to keep on breathing. He might've found a way, but life's never that easy. Clock's ticking, Harry. Learn fast now.
Harry Potter - Rated: M - English - Adventure - Chapters: 40 - Words: 285,866 - Reviews: 2105 - Favs: 6,179 - Follows: 5,329 - Updated: 1/28/2016 - Published: 7/9/2012 - Harry P., Albus D. - Complete
Mass Effect: A journey through the Eons by
Casje reviews
When a strange device capable of remarkable feats is found in the Martian ruins, the course of humanity's history changes forever. The resulting leaps and bounds in technology leave humanity well prepared to deal with the rest of the galaxy. AU
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 41,396 - Reviews: 487 - Favs: 1,583 - Follows: 1,932 - Updated: 8/26/2015 - Published: 11/17/2014
Crysis Effect 2 by
DemonFireX reviews
The end of Sovereign was only the beginning. Faced with obsticles he never thought he had to face, Alex will have to do whatever he can to protect everyone from the Reapers. No matter what it takes, he'll do what's needed when others refuse to. Everything has a price. But as long as he is at her side, nothing else matters. OC/FShep
Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 31 - Words: 165,951 - Reviews: 828 - Favs: 1,128 - Follows: 1,188 - Updated: 1/28/2015 - Published: 6/4/2013 - Shepard (F)
Of Sheep and Battle Chicken by
LogicalPremise reviews
My AU retelling of ME1 in a darker, sinister universe. Much darker and more realistic views of the SA and the Citadel Council, a more dangerous, involved Cerberus, and a more conflicted Saren and Benezia. Changes much of the ME1 dynamic to remove plot holes with more focus on politics, military strategy, and space combat. Pairing is FShep/Liara. Rewritten through Chapter 65 so far.
Mass Effect - Rated: M - English - Sci-Fi/Angst - Chapters: 123 - Words: 744,348 - Reviews: 1516 - Favs: 1,232 - Follows: 916 - Updated: 9/22/2014 - Published: 4/13/2012 - [Shepard (F), Liara T'Soni] Garrus V., Illusive Man - Complete
Crysis Effect by
DemonFireX reviews
To some, Death is an End. To others, Death is a new beginning. Alex Drake will learn that his death will lead to a new purpose. Armed with a powerful suit, his combat skills and his knowledge of the universe he finds himself in, he will strive to save the innocent. But will this soldier gain more than success in his mission? OC/FShep
Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 46 - Words: 213,270 - Reviews: 768 - Favs: 1,334 - Follows: 857 - Updated: 6/3/2013 - Published: 3/14/2013 - Shepard (F) - Complete
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: 2271 - Favs: 3,080 - Follows: 1,973 - Updated: 4/7/2013 - Published: 6/5/2012 - Harry P. - Complete
A Curse of Truth by
butalearner reviews
An avid fanfiction reader falls into the Harry Potter Universe just before the Triwizard Tournament, and has to come to terms with what he's lost, take advantage of what he's gained, and figure out how to deal with the truths he's hiding. Complete! Detailed rune magic, witty banter...not your usual SI, so give it a shot! See my author page for more info.
Harry Potter - Rated: M - English - Drama/Humor - Chapters: 28 - Words: 198,847 - Reviews: 1074 - Favs: 3,054 - Follows: 1,531 - Updated: 3/3/2013 - Published: 10/6/2012 - Harry P., Hermione G., OC, Daphne G. - Complete
Turn Me Loose: A Harry Potter Adventure by
jbern reviews
The sequel to Bungle in the Jungle. Told in 2nd person. Harry Potter has returned to England. In the jungles of South America, he became his own man, a hero of his own choice and not unfortunate circumstance. Is it enough to save him?
Harry Potter - Rated: M - English - Adventure - Chapters: 16 - Words: 134,063 - Reviews: 1948 - Favs: 4,283 - Follows: 2,302 - Updated: 11/13/2010 - Published: 8/31/2007 - Harry P., Luna L. - Complete