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The Sins of our Fathers
by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew. Crossposted by myself, Jabber the very wocky on Ao3.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 4 - Words: 29,995 - Reviews: 122 - Favs: 395 - Follows: 572 - Updated: 3/7 - Published: 2/11 - Master Chief/John-117, Miranda K., Cortana
by The Dark Scribbler reviews
The Red Wedding has happened and the Old Gods are getting worried about what has happened. They have no choice. Robb must return.
A song of Ice and Fire - Rated: K+ - English - Fantasy/Adventure - Chapters: 173 - Words: 722,087 - Reviews: 9215 - Favs: 8,150 - Follows: 8,684 - Updated: 3/3 - Published: 7/16/2015 - Eddard S./Ned, Robb S., Theon G., Domeric B.
On the Illusion of Might
by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 27 - Words: 297,181 - Reviews: 2072 - Favs: 3,781 - Follows: 4,776 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Place of Our Legacy
by firstprime1230 reviews
Earth has been overrun by the forces of the Ori. Beaten, demoralized and on the run in the Ancient city of Atlantis the survivors of Earth make a desperate gamble to save what little they have left. Arriving in a galaxy so different from their own, can they uphold the legacy left to them by the races that came before? And save a galaxy doomed to a suffer a fate worse than death.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 111,462 - Reviews: 328 - Favs: 872 - Follows: 1,224 - Updated: 1/17 - Published: 4/30/2020
by Seraphin2011 reviews
Book III: The Ori gone, Aschen imprisoned, Wraith changed and pacified, yet the Alliance is threatened once more. The Vargas are coming and no one knows how they are going to survive an enemy that spans throughout the known universe and had done so for billions of years. By closing the anomalies, they have postponed the invasion by more than two years, but will that be enough?
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 28 - Words: 406,779 - Reviews: 482 - Favs: 489 - Follows: 555 - Updated: 9/9/2022 - Published: 1/12/2017 - S. Carter, J. O'Neill
The Difference One Man Can Make
by joen1801 reviews
After the Battle of Hogwarts, Harry Potter decided to travel the world. Twelve years later when a new threat attempts to destroy the progress made in Britain he returns home to deal with the situation. During the fight that puts down the small group of upstarts Harry finds himself in a world of ice and fire
Crossover - Harry Potter & Game of Thrones - Rated: M - English - Adventure - Chapters: 23 - Words: 299,560 - Reviews: 5590 - Favs: 15,940 - Follows: 17,728 - Updated: 9/3/2022 - Published: 3/22/2015
The Raven's Plan
by The Sithspawn reviews
The Second War for the Dawn is over, the Others have won. All that is left is one insane plan.
Game of Thrones - Rated: M - English - Chapters: 48 - Words: 252,593 - Reviews: 2515 - Favs: 3,907 - Follows: 4,285 - Updated: 5/18/2022 - Published: 12/11/2017 - Jon S., Tyrion L., Bran S., Jaime L.
The Pack Survives
by Youngthundercat67 reviews
The last thing he saw before his head was taken off was the horror in his daughter's eyes. Then came the flashes, the visions of the atrocities that would happen to his family but the gods have given him a second chance. What changes can Eddard Stark make to win the Game of Thrones? Mix of books and show. AU.
Game of Thrones - Rated: T - English - Drama - Chapters: 59 - Words: 165,611 - Reviews: 1619 - Favs: 4,003 - Follows: 4,943 - Updated: 2/15/2022 - Published: 10/3/2019
The Winter Portal
by hydra523 reviews
A giant portal opens overnight between Earth and Planetos at the start of the series. The Westerosi schemers are unprepared for the Europeans who arrive with "magical" machines and a different morality.
A song of Ice and Fire - Rated: T - English - Fantasy - Chapters: 24 - Words: 54,929 - Reviews: 529 - Favs: 908 - Follows: 1,229 - Updated: 2/2/2022 - Published: 11/18/2020 - Jon S., Eddard S./Ned, Tyrion L., OC
Worldwar: Establishing A Balance
by AlbertG reviews
Summary-Book IV: Years ago, the Colonials of Cyrannus met the so-called 13th tribe. It didn't work out well. The Colonials met the Race. That didn't work out well either, but they were introduced to a much larger galaxy. Now their errors have come back and they know they are small fish in a large ocean trying to survive. Can they? Will the Race let them?
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 31 - Words: 199,624 - Reviews: 909 - Favs: 578 - Follows: 702 - Updated: 1/23/2022 - Published: 3/6/2016
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: 64 - Words: 345,885 - Reviews: 2934 - Favs: 4,528 - Follows: 4,976 - Updated: 1/1/2022 - Published: 8/8/2014
Mass Effect: Trailblazer
by TallYapflip reviews
Humanity, left to its own devices for centuries, comes into contact with the Citadel Council. A misunderstanding leads to hostile first contact, and the UNSC is drawn into war with the Council shortly after the Insurrection's height. The Council finds itself face-to-face with a species that has broken the shackles of Mass Effect Technology. The Era of Humanity has only just begun.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 73,932 - Reviews: 726 - Favs: 2,509 - Follows: 3,330 - Updated: 11/27/2021 - Published: 7/14/2017 - Master Chief/John-117, J. Keyes, Miranda L., Shepard
Mass Effect: End of Days
by Postmeat reviews
An ancient danger threatens the galaxy, unknown to all. A humanity which never discovered Prothean ruins, expanding through space on their own, emerges. Joined with the machines they created, hardened by war with a terrifying enemy, they read the writing on the wall. But will the galactic community already there listen to these newcomers, stirring up trouble everywhere they go?
Mass Effect - Rated: T - English - Sci-Fi/Suspense - Chapters: 20 - Words: 234,080 - Reviews: 739 - Favs: 2,914 - Follows: 3,524 - Updated: 8/1/2021 - Published: 3/8/2015 - Admiral Hackett, Shadow Broker, Shepard, Rachni Queen
The Lost Civilization
by Apollonir reviews
After the Battle of the Ark, a UNSC Pelican dropship crash lands on Thessia. Two ODSTs survive the crash and make contact with primitive Asari. Ninety thousand years later, Liara T'Soni discovers a strange looking aircraft and Human remains in an ancient cave burial chamber. The discovery she makes will take the Asari on a journey to discover their true lineage.
Crossover - Halo & Mass Effect - Rated: T - English - Mystery/Suspense - Chapters: 16 - Words: 33,722 - Reviews: 669 - Favs: 1,985 - Follows: 2,779 - Updated: 7/26/2021 - Published: 7/2/2017 - Ashley W., Liara T'Soni, Mordin S., Shepard
The Sum is Greater than its Parts
by Maersikai reviews
Having long since combined forces, a fleet of the Humans and Covenants finest are torn from the universe they know to be thrown in to a strange and desolate reality. They will strive to uphold the Mantle against the Mass Effect's most Ancient Enemy. Will they break the cycle?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 20 - Words: 181,741 - Reviews: 412 - Favs: 1,208 - Follows: 1,431 - Updated: 4/8/2021 - Published: 3/2/2015 - Cortana, J. Garson
by creamofwheat2311 reviews
After discovering an ancient artifact, the UNSC's most advanced warship and a Sangheili Assault Carrier are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 53 - Words: 473,247 - Reviews: 4081 - Favs: 5,503 - Follows: 6,464 - Updated: 3/30/2021 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard
A Song of Guns, Germs and Steel
by stannisthemannis1993 reviews
What if Westeros was mysteriously linked to the modern world, a short way into the start of the song of ice and fire?
A song of Ice and Fire - Rated: T - English - Fantasy - Chapters: 68 - Words: 232,883 - Reviews: 1280 - Favs: 1,196 - Follows: 1,161 - Updated: 3/22/2021 - Published: 4/10/2020 - Eddard S./Ned, Robert B., Renly B., Tyrion L. - Complete
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: 27 - Words: 79,685 - Reviews: 2964 - Favs: 8,441 - Follows: 8,741 - Updated: 2/16/2021 - Published: 5/7/2013 - Complete
The Fifth-Race Reclaimers
by Piero217 reviews
The Four Great Races once watched over thousands of worlds… but only one species was destined to inherit their place. Now, as an ancestral enemy rises from the ashes and threatens all life as we know it, humans from two different universes must learn to overcome their differences and stand together to reclaim the Mantle of Responsibility. Set shortly after the events of Spartan Ops
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 166,249 - Reviews: 269 - Favs: 457 - Follows: 475 - Updated: 1/23/2021 - Published: 6/1/2013 - Master Chief/John-117, C. Halsey, Cortana, John S. - Complete
The White Wolf
by LordShadowbane reviews
Jon Snow had died at the hand of his own brothers in black. Jon Snow was resurrected by The Red Priestess. Jon Snow fought The Boltons for The North with his people. Jon Snow was crowned The King in The North. Jon Snow stood before a dead Dragon. Jon Snow died by its horrible pale blue flames. Or did he?
Crossover - A song of Ice and Fire & Game of Thrones - Rated: M - English - Fantasy - Chapters: 29 - Words: 74,410 - Reviews: 83 - Favs: 565 - Follows: 666 - Updated: 12/4/2020 - Published: 11/5/2020 - Bloodraven, Jon S.
by Thuktun Flishithy reviews
An epistolary work that documents the Race and Fithp Invasions of 2020. Included within are interviews with survivors of the war on all sides, as well as key documents.
Crossover - Book X-overs & Worldwar series - Rated: T - English - Sci-Fi - Chapters: 23 - Words: 179,934 - Reviews: 73 - Favs: 99 - Follows: 64 - Updated: 11/10/2020 - Published: 9/19/2017 - Complete
Mass Effect: The Terran Gambit
by informedterran reviews
AU: A quickly advancing Humanity discovers early on the fate of the ancient Protheans and the threat of the Reapers. Instead of exploring the galaxy with wonder and optimism, the leaders of the Terran Nation prepare their young race to save themselves. When they finally make First Contact, they begin their ultimate gambit; To ready all the galaxy to fight the Reapers!
Mass Effect - Rated: M - English - Sci-Fi - Chapters: 40 - Words: 511,902 - Reviews: 342 - Favs: 1,245 - Follows: 1,423 - Updated: 9/6/2020 - Published: 4/16/2016 - OC
Dawn of Titans
by F13D reviews
There is nothing fair, just, or honorable about war. There is only winning and losing, the living and the dead. Humanity has learned this truth and has ascended to the stars. What effect will this have on the rest of the galaxy, one that has experienced millennia of peace? Will it be able to maintain the peace or will it be ushered into a new age of war? Let the end begin. A/U
Crossover - Mass Effect & EndWar - Rated: M - English - Sci-Fi/Adventure - Chapters: 36 - Words: 374,936 - Reviews: 722 - Favs: 1,077 - Follows: 1,291 - Updated: 8/21/2020 - Published: 7/15/2015 - D. Anderson, Admiral Hackett, OC
Mass Effect: Children of the Moons
by OmegaEntertainment reviews
"Humanity always knew, when we looked to the stars, that there could be an apex predator out there. However, while we knew that those predators could find us at the heart of our civilization, we could have never predicted that they would offer us Preservation." Rated M for Necromorphs and Brethren Moons, no other reason is needed for the rating.
Crossover - Mass Effect & Dead Space - Rated: M - English - Sci-Fi/Horror - Chapters: 13 - Words: 49,281 - Reviews: 115 - Favs: 497 - Follows: 590 - Updated: 8/7/2020 - Published: 12/11/2017 - Harbinger, Shepard, Isaac C., OC
by ResurgentClone reviews
The Lucian Alliance is defeated, the line has been held against the Wraith in orbit around Earth. Now it's time for Atlantis to yield it's secrets.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 14 - Words: 27,003 - Reviews: 288 - Favs: 432 - Follows: 591 - Updated: 6/2/2020 - Published: 9/26/2012
by TallYapflip reviews
The First Contact War brought untold destruction to Earth, reducing Humanity to a shell of its former self. For 900 years, Humanity has been working tirelessly to lay claim to its own slice of the Milky Way Galaxy, and they are prepared to bring the Council to its knees to accomplish their goals. (Massive AU, New Technologies, and a far different humanity.)
Mass Effect - Rated: M - English - Sci-Fi - Chapters: 22 - Words: 109,371 - Reviews: 581 - Favs: 2,345 - Follows: 2,806 - Updated: 1/28/2020 - Published: 3/4/2016 - [Samantha T., Shepard] Admiral Hackett, OC
Contact at the Citadel
by wilkins75 reviews
Sequel to Contact of Kobol and Contact of Races. Earth and other worlds are united in the Tau'ri Alliance, with the advance technology from the Ancients and the Asgard they are the most advanced culture in the Galaxy. Now they must travel to a distant galaxy to finish the mission of the Destiny only to contact the Citadel Council and the Reapers. (Stargate Sg1/Mass Effect)
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 21 - Words: 177,578 - Reviews: 1219 - Favs: 1,444 - Follows: 1,737 - Updated: 11/18/2019 - Published: 4/23/2018
Roads Paved in Shadows
by AlbertG reviews
"We don't have information on the numbers yet, sir," one of the commanders answered quickly. "It's not the Cylons. The Thirteenth Tribe is attacking us. We're at war with Earth." Adar was completely stunned that emotion quickly turning into a burning rage. "But why?" he snarled as his rage turned into a need for vengeance.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 25 - Words: 133,926 - Reviews: 369 - Favs: 325 - Follows: 376 - Updated: 10/18/2019 - Published: 3/19/2017 - J. O'Neill, W. Adama
The Catalyst For Revenge
by Jade Tatsu reviews
Shepard chose to destroy Sovereign. The Council then declared war on the SA for that betrayal. The Humans tried to fight but it was a losing battle. Subjugation leading to extinction was not acceptable for making the hard military decision so the Humans chose another path and made a deal with the Reapers. The galaxy and the Cycle would never be the same. AU Eternity beckons.
Mass Effect - Rated: T - English - Adventure/Drama - Chapters: 162 - Words: 1,180,028 - Reviews: 4603 - Favs: 1,697 - Follows: 1,587 - Updated: 10/10/2019 - Published: 10/10/2016 - Ashley W., Illusive Man, Harbinger, Shepard - Complete
Halo: The Ori War
by DX1998 reviews
7 Months Ago...the USS Odyssey vanished without a trace. Seven long months, that saw the Ori march almost unopposed through the Milky Way Galaxy. With none able to stand against them, the armies of Origin were triumphant in all battles. But now...now the Odyssey has returned, and with the aid of the UNSC and Sangheili, they will bring the fight to the Ori.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Adventure/Drama - Chapters: 15 - Words: 60,674 - Reviews: 555 - Favs: 1,014 - Follows: 1,268 - Updated: 8/7/2019 - Published: 10/7/2014
The Reclaimer Effect
by Seawolf321 reviews
It's the eve of the centennial anniversary of the beginning of the Human-Covenant War. A mere twenty years after the discovery of Prothean Ruins on Mars. A simple case of poor communication leads to a brief but violent conflict erupting and leads to the United Earth Government and it's military arm the UNSCDF coming onto the Galactic Stage of politics, mysteries, and adventures.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 17 - Words: 174,265 - Reviews: 666 - Favs: 1,178 - Follows: 1,639 - Updated: 6/27/2019 - Published: 2/28/2018
A Spartan in Westeros (A Song of Ice and Fire X Halo Crossover)
by Agailius reviews
When the Forward Unto Dawn lands in the North, it sets the stage for untold repercussions which will ripple throughout the whole of Westeros. With civil war threatening to tear the land apart, and an entirely more dire threat arising beyond the Wall, John and Cortana take it upon themselves to again protect the whole of mankind; from both it's own demons... and those beyond.
Crossover - Halo & A song of Ice and Fire - Rated: M - English - Sci-Fi/Fantasy - Chapters: 21 - Words: 128,153 - Reviews: 1732 - Favs: 4,312 - Follows: 4,920 - Updated: 10/1/2018 - Published: 6/3/2014 - Master Chief/John-117, Cortana, Jon S., Eddard S./Ned
The Strange Ship
by regularmother reviews
In a hunt for raw materials for their people, Quarian explorers open a new mass relay. What awaits them on the other side is nothing they could have ever expected. Pre-Mass Effect 1, Post-Halo 4; AU only where necessary to mash two universes together and create something resembling a coherent storyline.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 48,490 - Reviews: 286 - Favs: 1,085 - Follows: 1,590 - Updated: 9/4/2018 - Published: 10/25/2016
Odyssey: The Journey Home
by fmfan1980 reviews
As the Odyssey find her way into the hyperspace window when Orilla blows up, the crew of the Odyssey find themselves in another reality. Now, the question becomes how do they get back home for their own war against the Ori. (30.08.2018: I will be doing a lot of re-edits from Chapter 1 onwards. The rest of the chapters are being deleted until I can finish rewriting them.)
Crossover - StarTrek: Deep Space Nine & Stargate: SG-1 - Rated: K+ - English - Chapters: 1 - Words: 5,200 - Reviews: 205 - Favs: 344 - Follows: 499 - Updated: 9/1/2018 - Published: 1/3/2017
The Young not always Listen
by LordXaero reviews
The Citadel Council is looking for resources, what would they find.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 3,942 - Reviews: 24 - Favs: 125 - Follows: 87 - Published: 8/1/2018 - Complete
Stargate Atlantis: Inheritance
by TimeWolfBadLord reviews
If you're bummed about the show ending without a conclusion, this story is for you. Takes place some time after the events of the movie that never was...
Stargate: Atlantis - Rated: K - English - Adventure/Sci-Fi - Chapters: 22 - Words: 149,767 - Reviews: 39 - Favs: 83 - Follows: 101 - Updated: 5/7/2018 - Published: 4/23/2016
Contact of Races
by wilkins75 reviews
Sequel to Contact at Kobol (Stargate/Battlestar). The Race has thrived for hundreds of thousands of years and who recently conquered their 5th world are heading toward Tosev 3, Earth believing the conquest to be ease against the sword swing savages. Little do they know that those sword swing savages are now one of if not the most powerful force in the Galaxy, the Tau'ri.
Crossover - Stargate: SG-1 & Worldwar series - Rated: T - English - Sci-Fi/Drama - Chapters: 25 - Words: 210,603 - Reviews: 1201 - Favs: 947 - Follows: 869 - Updated: 4/3/2018 - Published: 6/17/2017 - S. Carter - Complete
by kaleb-yamato reviews
The Colonials discover they are not alone in the universe just in time for it to start falling apart around them. Can 12 isolated planets separated from the rest of the universe for thousands of years survive long enough to establish themselves or will they be swept away with the coming tide. DISCONTINUED UP FOR ADOPTION
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Suspense - Chapters: 8 - Words: 58,212 - Reviews: 195 - Favs: 353 - Follows: 461 - Updated: 3/4/2018 - Published: 4/3/2014
The Lost Heir
by ChaoticHunter13 reviews
Jon is born to Ned Stark and Ashara Dayne several years before the Tourney at Harrenhal. He grows up in Winterfell surrounded by his family, but when his father marries Catelyn Tully after the death of his mother certain events lead to Jon joining the Company of the Roses. Now he is back in the North ready to claim what is owed to him and make the North a true superpower. Pls R&R
A song of Ice and Fire - Rated: T - English - Adventure/Family - Chapters: 8 - Words: 56,827 - Reviews: 326 - Favs: 1,699 - Follows: 2,083 - Updated: 1/24/2018 - Published: 1/26/2017 - Jon S., Eddard S./Ned
Beacon's Effect 4: Reckoning
by Tusken1602 reviews
Sequel to "Beacon's Effect 3: Awakening." In our darkest hour, we follow the adventures of Ko'le and Shepard as they attempt to break a cycle that has existed longer than any could imagine, going on seemingly impossible missions against seemingly invincible foes. But for Shepard and Company, that is what they do best. Rated 'M' for violence, language, and 'stuff.'
Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 29 - Words: 131,404 - Reviews: 512 - Favs: 654 - Follows: 541 - Updated: 1/2/2018 - Published: 12/16/2016 - Complete
Contact at Kobol
by wilkins75 reviews
The scrolls tell that 13 tribes left the birthplace of humanity on Kobol, 12 went one way and the other Earth went another only to lose all contact with their cousins. It is written that one day they would reunite but when they Earth meets their cousins it is not what they expected and it would cost both sides in blood. (Stargate SG1/Battlestar Galactica)
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Adventure - Chapters: 80 - Words: 478,758 - Reviews: 5346 - Favs: 1,682 - Follows: 1,539 - Updated: 5/25/2017 - Published: 3/20/2015 - Complete
Mass Effect: Escherian Era
by Akallas von Aerok reviews
First Contact AU: What would you do if you find out that you were revived from death by moving your consciousness into a robotic body and then also learn that your descendants have established an interstellar empire that bows to no one? That's my situation right now. My name is David Escher Senior, and welcome to my rather turbulent second life.
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 50,740 - Reviews: 168 - Favs: 538 - Follows: 628 - Updated: 4/29/2017 - Published: 2/15/2017
by Oledom reviews
In the Year 2142, Unggoy explorers on Buwan discovered the remains of an ancient spacefaring civilization. They called it the greatest discovery in Unggoy history The civilizations of the galaxy call it. Mass Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 9 - Words: 14,150 - Reviews: 53 - Favs: 132 - Follows: 130 - Updated: 4/11/2017 - Published: 1/28/2017
Project Blue Book
by AmeliusTheAlteran reviews
Involved Presidents, an inquisitive assistant, and professional soldiers. A pragmatic look on how the United States would use the stargate and explore uncharted planets.
Stargate: SG-1 - Rated: T - English - Adventure - Chapters: 24 - Words: 89,124 - Reviews: 411 - Favs: 862 - Follows: 1,026 - Updated: 3/25/2017 - Published: 11/30/2014
Stargate: The Second Great Alliance
by Seraphin2011 reviews
With the Second Great Alliance finally being formed, the Guardians, the Terrans, the Asgard and the Nox are set out to bring everlasting peace and prosperity to the region of space they inhabit. A task not easy to accomplish when faced by so many, old and new, enemies constantly trying to destroy them with every means at their disposal.
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 42 - Words: 458,330 - Reviews: 762 - Favs: 674 - Follows: 592 - Updated: 1/5/2017 - Published: 9/14/2012 - J. O'Neill - Complete
The Next Great Journey
by alanvaladez reviews
After the destruction of Requiem and an attack against Earth, both the UNSC and Covenant Separatist form the Systems Alliance. Then a discovery in the Deca-5 system changes everything for all sides. Cold War like conflict, lots of ONI , AU for Mass Effect and a council that actually thinks before it acts.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 19 - Words: 150,316 - Reviews: 206 - Favs: 524 - Follows: 548 - Updated: 10/30/2016 - Published: 9/8/2014 - Master Chief/John-117, OC, Saren A., OC - Complete
The New Order of Tribes
by Talphon44 reviews
A different look at what happened when the Galactica arrived at Earth. The Battlestar will set in motion a series of events that will rock the foundation of not just one civilization but multiple ones. This is my first attempt at fan-fiction, but I intend to follow through on what hopefully will be a very long story, one of many that will take place in this universe.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 49,714 - Reviews: 294 - Favs: 484 - Follows: 709 - Updated: 9/5/2016 - Published: 12/14/2015
by Dave19941000 reviews
A small stretch of the truth by an enemy long thought gone leads to a clash of worlds. With Earth unwilling to let an attempted invasion slide and the Colonials having lost too much blood to back down, it seems worlds burning is inevitable. Just as planned.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 50 - Words: 233,825 - Reviews: 412 - Favs: 354 - Follows: 440 - Updated: 8/23/2016 - Published: 8/18/2014 - Complete
by doctor chocolate thunder reviews
The ORI have been defeated and Atlantis is in fast action on mars. Earth is aware of the stargate now and has begun to embrace its roll. Meanwhile in Pegasus New Lantea is also in full swing fighting the Wraith, But daniel and SG-1 have a new mission. A mission that could change the pegasus galaxy and the whole universe. both stargates bsg and The matrix will get time here
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Suspense - Chapters: 12 - Words: 89,292 - Reviews: 89 - Favs: 188 - Follows: 193 - Updated: 4/21/2016 - Published: 2/28/2013 - D. Jackson - Complete
Tauri Furling: First Contact and Alliance
by StargateFFWriter reviews
Anti-Ori War; much more competent Ori/Orisian military than in OTL. Y2000 Tauri meet the militarily mighty Furling, returning from choiceless exile, to ally with the Tauri. These two great races will unite the war-capable races in 3 galaxies for a common purpose. The Alliance and the Ori Orisian corporeals had both better be beware!
Stargate: SG-1 - Rated: K+ - English - Sci-Fi/Drama - Chapters: 14 - Words: 55,618 - Reviews: 36 - Favs: 35 - Follows: 36 - Updated: 10/7/2015 - Published: 4/8/2011 - J. O'Neill, Teal'c
Mass Effect: Synthesis
by Jade Tatsu reviews
"To the Sol Alliance and all of Humanity, greetings. I am Harbinger and I have traveled across the galaxy to meet you." Shepard wasn't the first to reach the Catalyst, eons ago, someone else did and they chose synthesis, embedding the desire in the Reapers. They've searched for organics to merge with ever since and now they've found them. AU, First Contact, Humans / Reapers
Mass Effect - Rated: T - English - Adventure/Drama - Chapters: 39 - Words: 203,198 - Reviews: 1732 - Favs: 2,660 - Follows: 1,842 - Updated: 4/18/2015 - Published: 11/5/2014 - J. Garson, Harbinger, Garrus V., Saren A. - Complete
by Andrithir reviews
There are stories about them, myths and legends of once majestic species overseeing the galaxy and exploring into the space that lay beyond. There were stories about them, tales of faded past. Humanity's missing link. (Rewrite Chapters 1 to 3 now posted) COMPLETED. Rewrites are on hiatus.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 67 - Words: 328,897 - Reviews: 1661 - Favs: 1,582 - Follows: 1,463 - Updated: 2/20/2015 - Published: 10/8/2011 - Master Chief/John-117, Shepard - Complete
Stargate: The Million Year War
by W1553 reviews
When the city of the Ancients realises that it has returned to Earth, for the first time in several million years, plans laid out during the only war the real Ancients where losing starts to unravel. First story I've every written. Please read and review. (WIP)
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Sci-Fi - Chapters: 34 - Words: 158,378 - Reviews: 220 - Favs: 284 - Follows: 344 - Updated: 2/17/2015 - Published: 5/20/2013 - D. Jackson, J. O'Neill, Rodney M., John S.
A Clashing of Ways
by Avid Reader403 reviews
Ten years have passed since the Human-Covenant War ended and the birth of the Species Assembly has brought peace to the Galaxy. Or, at least their part of it. The discovery of a Mass Relay sparks yet another war that will have consequences for all sides involved. The Galaxy will never be the same. Disclaimer: I do not own the franchises.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 13 - Words: 42,422 - Reviews: 638 - Favs: 1,331 - Follows: 1,661 - Updated: 12/25/2014 - Published: 9/20/2012 - Shepard
For Fleet and Flotilla - ON PERMANENT HIATUS
by CAS2109 reviews
When the crew of the BattleStar Hades discover unknown debris and a massive structure while on the run from a Cylon fleet, they find themselves thrown onto the galactic stage. How will they adapt to the new challenges thrown at them? Will they ever retake the colonies? Or will they find themselves drawn to a certain race of nomads who share their hate of Artificial Intelligence?
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 39,552 - Reviews: 73 - Favs: 175 - Follows: 237 - Updated: 10/23/2014 - Published: 1/13/2014 - OC, Tali'Zorah, Admiral Hackett
WorldWar: The Balance Destroyed
by AlbertG reviews
The 'Race', and the Colonials of Cyrannus each tried to conquer Earth. They both failed. The Race has a new colony now. The Colonials haven't finished yet. It's a bad combination all around because everyone's stubborn. Welcome to the galaxy at large.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Fantasy - Chapters: 30 - Words: 148,076 - Reviews: 794 - Favs: 695 - Follows: 597 - Updated: 10/11/2014 - Published: 3/16/2010 - Complete
by AlexanderD reviews
How much naquadah would a woodchuck chuck if a woodchuck could chuck naquadah?
Stargate: Universe - Rated: T - English - Chapters: 54 - Words: 354,787 - Reviews: 1381 - Favs: 546 - Follows: 517 - Updated: 7/24/2014 - Published: 5/1/2012
Exiles on the Wind
by Fabius Maximus reviews
The Cylons destroyed over 90 percent of Colonial civilian and military forces. Unfortunately, when you're talking about a civilization as large as the Colonies, that leaves a LOT of survivors. One group is going to go looking for Adama.
Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Drama - Chapters: 19 - Words: 43,613 - Reviews: 159 - Favs: 237 - Follows: 200 - Updated: 6/10/2014 - Published: 3/15/2014 - Complete
The Fifth Race
by Lord Nomad reviews
Stargate SG1/Battlestar Galactica Crossover: Set after the movie "the Ark of Truth" and Season 3 of BSG. The remnants of the 12 colonies of Kobol are at the end of their journey and encounters the Fifth race.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 16 - Words: 83,273 - Reviews: 264 - Favs: 554 - Follows: 652 - Updated: 2/28/2013 - Published: 3/24/2008
Over the Horizon
by Glennfiddich12 reviews
While on missions of discovery, two cultures meet and must face the challenges of their enemies and their pasts together. A Battlestar Galactica/Stargate crossover.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Drama/Adventure - Chapters: 10 - Words: 197,463 - Reviews: 422 - Favs: 584 - Follows: 712 - Updated: 12/31/2012 - Published: 2/22/2010
Stargate Thirdspace Version 2
by andrewjameswilliams reviews
Rewrite of Stargate Thirdspace. In the 26th century a group of Tau'ri ships is sent to investiage a new and strange galaxy, inadvertantly triggering a war that could lead to the obliteration of all sentient life in the universe.
TV X-overs - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 5 - Words: 32,137 - Reviews: 122 - Favs: 311 - Follows: 283 - Updated: 9/18/2012 - Published: 10/18/2010
csj the extended version
by Mr. Aanonymous reviews
My take on the original. How will the wraith handle a glorified 'not so ancient' ancient and an super Satedan with cool toys along with the Atlantis expedition. Set during the Wraith-Replicator war.
Crossover - Star Wars & Stargate: Atlantis - Rated: T - English - Chapters: 17 - Words: 57,738 - Reviews: 47 - Favs: 24 - Follows: 24 - Updated: 8/18/2012 - Published: 12/21/2011
Stargate: The Guardian's Order
by Seraphin2011 reviews
The story follows the advantures of Liam, an Alterran who decides to leave the higher plane of existance in order to take care of the many mistakes his race made before ascending.
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 266,741 - Reviews: 265 - Favs: 757 - Follows: 510 - Updated: 8/6/2012 - Published: 4/16/2012 - J. O'Neill - Complete
The Shepard Code
by quondam reviews
Set Post-ME3 where Shepard chooses Control. A hundred years after the Reaper War, a Turian ship captained by the grandson of Garrus Vakarian comes across a derelict Reaper inhabited by a hologram of Commander Shepard.
Mass Effect - Rated: K+ - English - Chapters: 2 - Words: 7,111 - Reviews: 143 - Favs: 756 - Follows: 164 - Published: 5/5/2012 - Garrus V., Shepard - Complete
A New Dawn
by AlexanderD reviews
SG1, Atlantis, and SGU all work towards a brighter future. Past conflicts heat up more than imagined, and a long wondered question is answered. Ancients, Tauri, Asgard, Furling, and a few others thrown in. This ties up the loose ends the writers left us.
Stargate: Universe - Rated: T - English - Sci-Fi/Adventure - Chapters: 74 - Words: 295,200 - Reviews: 1400 - Favs: 889 - Follows: 598 - Updated: 4/16/2012 - Published: 4/29/2011 - Complete
Stargate: Birth of the Federation
by Nairda reviews
With the Asgard and Ancient repository of knowledge, humanity stands ready for a new birth. "It tells the story of the newly created Terran Federation from a Macroscale point of view. Federation expansion, Space battles and the like."
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 100,942 - Reviews: 234 - Favs: 448 - Follows: 492 - Updated: 2/6/2012 - Published: 2/20/2010
The Quantum Gate: Prologue
by ChaosCarlos reviews
AU. Set 20 years after Season 8. The Ori fleet has decimated the Milk Way and Ida Galaxies, in one last desperate attempt, the Tau'ri, Asgard, Jaffa and Tok'ra plan to escape through a Quantum Gate to a reality free of their enemies. Multi-Crossover.
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 26,614 - Reviews: 156 - Favs: 307 - Follows: 267 - Updated: 10/12/2011 - Published: 2/5/2009 - Complete
by College Fool reviews
A species without Paragons is one with a sad and terrible history. Humanity enters a very different First Contact War, and Mass Effect as you know it will change. Warning: this fic may make you rage and wish genocidal retributions against aliens.
Mass Effect - Rated: K+ - English - Chapters: 70 - Words: 95,544 - Reviews: 965 - Favs: 1,154 - Follows: 691 - Updated: 9/25/2011 - Published: 7/11/2011
by NOVARAY reviews
This if the first in a series of stories of what might have been. A fleet has been sent out on an exploration mission into deep space two years before the Fall. What will they find when they return?
Battlestar Galactica: 2003 - Rated: K - English - Sci-Fi - Chapters: 14 - Words: 102,081 - Reviews: 89 - Favs: 134 - Follows: 72 - Updated: 12/2/2010 - Published: 8/18/2010 - Complete
Battlestar Group 41
by Mercury Actual reviews
Enroute to intercept a Cylon fleet in the Ionian Nebula, Apollo diverts to intercept a bogey. It turns out to be a medium sized Colonial battlestar, which transmits the cryptic message MISSION ACCOMPLISHED... please read and review
Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 20 - Words: 96,433 - Reviews: 129 - Favs: 116 - Follows: 140 - Updated: 11/27/2008 - Published: 4/29/2007
The Respository reviews
Heavily AU in progress. The cycle never ends, the Reapers have defeated the combined Prothean and Human fleets, not all hope is lost one ship the Repository, holds their hope for revenge a way to surrive and rebuild, to guide the next cycle against the Reapers. ON HOLD
Mass Effect - Rated: K - English - Sci-Fi/Adventure - Chapters: 2 - Words: 2,634 - Reviews: 7 - Favs: 47 - Follows: 69 - Updated: 8/7/2017 - Published: 8/3/2017