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When Worlds Collide by
BQ Green reviews
When the airspace above Hogwarts is accidentally marked "unrestricted," events are set in motion that will change the wizarding world forever. Eventual romance between Fleur and an OC. Main character for the story is OC. Rated M for violence, sexual themes (later in story) and language. Also a Hermione/OC pairing
Harry Potter - Rated: M - English - Romance - Chapters: 55 - Words: 228,095 - Reviews: 129 - Favs: 146 - Follows: 220 - Updated: 9/4 - Published: 1/15/2017 - [Fleur D., OC] Hermione G.
All the Stars by
BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 362,913 - Reviews: 456 - Favs: 744 - Follows: 976 - Updated: 8/27 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard (F)
Man off the Moon by
FiendLurcher reviews
The story of an unyielding man thrust into a galaxy of myriad grays—of questioning the past and of walking the same steps, wondering whether any answers beyond death lie at the end of that long, ever-winding road. (Ch36@10.1k words atm)
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 35 - Words: 646,317 - Reviews: 2796 - Favs: 3,444 - Follows: 3,862 - Updated: 6/16 - Published: 4/15/2018 - Archer
Biomass Effect by
Beastrider9 reviews
All life on Earth had been consumed by Blacklight. With no Biomass to feed on, Blacklight had to evolve, adapt, and grow. Now a collective Council of Aliens discovers the existence of such a life form. How do the aliens see a form of life that is viral, how they deal with it, what are the consequences to the galaxy of such a race existing at all.
Crossover - Mass Effect & Prototype - Rated: M - English - Sci-Fi - Chapters: 59 - Words: 303,766 - Reviews: 2634 - Favs: 3,565 - Follows: 3,995 - Updated: 12/3/2018 - Published: 8/8/2014
The Human War by
Generatedname reviews
The Citadel Council is a peaceful conglomerate of races, blissfully unaware of the horrors that lurk beyond their space. Humanity, meanwhile, is a race that has fought against these alien horrors ever since they made contact. What will happen when the two societies meet? Will peace follow war? Or is the Citadel Council doomed to fall to humanity? Rewrite of When Civilizations Meet.
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 138,222 - Reviews: 651 - Favs: 1,653 - Follows: 2,262 - Updated: 5/30/2018 - Published: 3/29/2016
The Legacy of the Prophets by
Goodpie2 reviews
H.P. Lovecraft was more than just a writer, though he didn't know it. So when humans, decades after his death, find certain artifacts, they look to his work for guidance. But it isn't enough. Forced to flee their home, Humanity stumbles upon a group of races with no knowledge of the Eldritch. To Humanity, the Council is naive and ignorant. To the council, the humans are lunatics.
Crossover - Mass Effect & Cthulhu Mythos - Rated: T - English - Sci-Fi - Chapters: 7 - Words: 33,135 - Reviews: 199 - Favs: 780 - Follows: 957 - Updated: 4/16/2016 - Published: 2/9/2016
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: 1,584 - Follows: 1,934 - Updated: 8/26/2015 - Published: 11/17/2014
The Accidental Bond by
kb0 reviews
Harry finds that his "saving people thing" is a power of its own, capable of bonding single witches to him if their life is in mortal danger, with unusual results. H/multi
Harry Potter - Rated: M - English - Drama/Adventure - Chapters: 33 - Words: 415,017 - Reviews: 4218 - Favs: 7,385 - Follows: 5,323 - Updated: 1/16/2013 - Published: 12/23/2009 - Harry P. - Complete