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Empires Unite! Milky Way by SapphireDawn11709 reviews
When the SGC Destroys the Quantum Mirror after the incident were Doctor Carter and Major Kawasaki appear in Area 51a ripple was sent across the multiverse. When this ripple hit a Forerunner portal chaos ensues as fleets from three universe appear in the Milky Way. Starship Troopers, Mass Effect, Halo Stargate
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 13,234 - Reviews: 24 - Favs: 124 - Follows: 165 - Updated: 1/11 - Published: 6/24/2019 - T. Lasky, S. Carter
Voyage unto Infinity by supertruckin reviews
The USS Voyager comes face to face with the massive ship that is the UNSC Infinity after Voyager's nearly fatal first test of their quantum slipstream drive. Getting home isn't their only issue. They will have to work together in order to unravel the ancient threat that plagues the new galaxy that they find themselves in. Star Trek:Voyager, Mass Effect, and Halo triple crossover
Crossover - Mass Effect & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 79,399 - Reviews: 596 - Favs: 1,461 - Follows: 1,926 - Updated: 1/2 - Published: 4/10/2019 - Master Chief/John-117, Cortana, Shepard
Encounter at Kobol by fanfictionfanaticX reviews
Two wars in different times and locations bring two fleets together. One wants to find a new home, the other return to it. But all the while a mystery from the past and an uncertain future loom over the horizon.
Crossover - StarTrek: Other & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 219,244 - Reviews: 146 - Favs: 170 - Follows: 235 - Updated: 12/25/2021 - Published: 5/14/2021
Right Time, Right Place by Chris Alexander the Bearded reviews
The Battlestar Thessalia jumps to the wrong place, twice... right in the middle of the worst first contact of the Babylon 5 universe.
Crossover - Babylon 5 & Battlestar Galactica: 2003 - Rated: K - English - Sci-Fi - Chapters: 13 - Words: 31,627 - Reviews: 118 - Favs: 92 - Follows: 143 - Updated: 11/13/2021 - Published: 6/29/2021
A Funny Thing Happened on the Way to the Tok'ra Base by Randompersonwithcomputer reviews
While delivering the Stargate to the new Tok'ra base, SG-1 and their allies meet a ragtag, fugitive fleet lead by the Battlestar's Galactica and Pegasus. The galaxy will never be the same again.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K - English - Sci-Fi - Chapters: 2 - Words: 2,565 - Reviews: 21 - Favs: 70 - Follows: 141 - Updated: 10/20/2021 - Published: 10/12/2021
Ten Piece by Spartan of Chaos reviews
Ben Tennyson and his team are in for the adventure of a lifetime when Professor Paradox sends them on a mission to aid the Straw Hat Pirates in finding the legendary treasure One Piece and help Monkey D. Luffy achieve his dream of becoming the Pirate King.
Crossover - One Piece & Ben 10 - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 127,412 - Reviews: 164 - Favs: 369 - Follows: 332 - Updated: 10/4/2021 - Published: 12/12/2016 - Luffy, unknown 1, Ben T., Vilgax
Ascendant by evevee reviews
A single ship can change a galaxy. The Normandy had already proven that, yet much like that vessel this new wreck was also dead. So it seemed at first at least, but just because something is dead does not mean it is forgotten.
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 5 - Words: 38,561 - Reviews: 205 - Favs: 585 - Follows: 649 - Updated: 9/18/2021 - Published: 8/21/2021 - Liara T'Soni - Complete
United we Stand by Mayto reviews
At the height of the Human Covenant war, another galactic power intervenes to aid the embattled humans. Standing side by side with the Turians, the UNSC prepares for a new phase of the Human Covenant war.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 86 - Words: 308,563 - Reviews: 1395 - Favs: 1,231 - Follows: 1,518 - Updated: 6/6/2021 - Published: 3/26/2019
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: 31 - Words: 226,020 - Reviews: 1063 - Favs: 1,913 - Follows: 2,543 - Updated: 4/24/2021 - Published: 11/26/2013 - Master Chief/John-117, Cortana, J. Garson
Unintended consequences by fanfictionfanaticX reviews
A small change in the past by SG-1 may have unexpected side effects for the rest of the galaxy.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Chapters: 19 - Words: 401,126 - Reviews: 464 - Favs: 617 - Follows: 843 - Updated: 4/22/2021 - Published: 6/17/2018
Voyager Lost by fmfan1980 reviews
Based on an idea that popped into my head last night. Voyager was traveling at Warp, after leaving behind the 37's, when the ship encountered a subspace anomaly that brought it to the Pegasus Galaxy in another reality (On hiatus).
Crossover - StarTrek: Voyager & Stargate: Atlantis - Rated: K+ - English - Chapters: 13 - Words: 45,372 - Reviews: 259 - Favs: 459 - Follows: 663 - Updated: 3/7/2021 - Published: 4/2/2017
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: 27 - Words: 79,685 - Reviews: 2911 - Favs: 8,060 - Follows: 8,554 - 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: 265 - Favs: 431 - Follows: 454 - Updated: 1/23/2021 - Published: 6/1/2013 - Master Chief/John-117, C. Halsey, Cortana, John S. - Complete
In Fire Forged (StargateHalonBSG fusion) by Illuviar reviews
The Supreme System Lord Ra has been missing for a year, the System Lords are straining their bonds, at a perilous time. The alien Covenant has proclaimed the Goa'uld and their servants, as False Gods and Heretics to be exterminated. Meanwhile, the beleagued UNSC struggles for survival, while the 12 Colonies of Kobol are none the wiser about the dangers lurking in the dark...
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 21,458 - Reviews: 23 - Favs: 95 - Follows: 123 - Updated: 12/9/2020 - Published: 10/23/2020
The Final Frontier: The Last Cycle V2 by WisdomOfCelestials reviews
Humanity has not met the Council, nor met the Covenant, and a two-pronged First Contact is due. How will these meetings shape the future to come, and the future that might have been? Buffed Humanity, Buffed Reapers,Halo/Mass Effect Crossover, Combined Universes, Modified Timeline. Rework of the older The Final Frontier: The Last Cycle. Use App, Browser Broke.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 56,776 - Reviews: 111 - Favs: 394 - Follows: 538 - Updated: 11/21/2020 - Published: 10/1/2020
The Fermi Paradox by KisaragiKei reviews
The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations and various high estimates for their probability. The Probability has always been high, and according to this line of reasoning, the Earth should have already been visited by an extraterrestrial civilization. So Where?
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 33,778 - Reviews: 95 - Favs: 283 - Follows: 398 - Updated: 10/28/2020 - Published: 3/10/2020
The Pegasus Intervention by kaln7 reviews
With the Covenant war over the UNSC can finally begin exploring the universe, but there first step outside their galaxy could lead them to another enemy that would prefer to feed on them instead of destroying them, can one ship survive in a galaxy teaming with an overwhelming enemy or will they get help from a group of humans who are also exploring the universe themselves.
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 130,592 - Reviews: 136 - Favs: 270 - Follows: 357 - Updated: 7/30/2020 - Published: 4/7/2017
Stargate A New Age by kaln7 reviews
Shepard defeated the Collectors, but now he must face a universe different from his own, but his team won't be the only team to help him get through this uncertain future.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 139,844 - Reviews: 146 - Favs: 224 - Follows: 341 - Updated: 7/30/2020 - Published: 4/6/2017
Valor of the Suns by Walker-98 reviews
As President Clark tightens his grip on the Earth Alliance worlds, a group of Earthforce officers rebel and steal a top-secret starship. Barely understanding the ship and its capabilities, the unlikely crew will soon be caught up in events and forces that will reshape the entire galaxy.
Babylon 5 - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 45,617 - Reviews: 18 - Favs: 47 - Follows: 65 - Updated: 6/25/2020 - Published: 2/16/2016 - OC
Stranded by pop off valve reviews
Apollo is stranded with no way back to the Galactica and facing an enemy worse than the Cylons.
Crossover - Stargate: Atlantis & Battlestar Galactica: 2003 - Rated: K+ - English - Chapters: 1 - Words: 3,686 - Reviews: 11 - Favs: 21 - Follows: 35 - Published: 4/16/2020 - Elizabeth W., Sora, L. Adama/Apollo - Complete
A Brutal Reality by BIG Z1776 reviews
NOW BEING REWRITTEN. The Colonials have just started taking their first steps into a much larger galaxy where danger, friends, and the unknown lie around every corner. And Earth has now taken the next huge step into the galaxy and its rise to superpower is all but inevitable. So what's to stop them? Old enemies from the past thought to be gone and new ones not yet seen.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Adventure/Sci-Fi - Chapters: 31 - Words: 180,663 - Reviews: 513 - Favs: 567 - Follows: 716 - Updated: 3/12/2020 - Published: 2/15/2015
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: 1198 - Favs: 1,367 - Follows: 1,679 - Updated: 11/18/2019 - Published: 4/23/2018
DBZ: Crisis on Two Earths by dbzfan1911 reviews
The battle against Cell goes drastically worse than in the show. When their power rips a portal that sends our heroes into the Young Justice universe, how will the Team react to having a new member from a mysterious species? How will Gohan, Tien, Piccolo, and Vegeta handle their new surroundings? With new adventures and challenges, find out what happens!
Crossover - Dragon Ball Z & Young Justice - Rated: T - English - Adventure - Chapters: 12 - Words: 23,489 - Reviews: 81 - Favs: 108 - Follows: 153 - Updated: 8/10/2019 - Published: 3/1/2016 - [Zatanna Z., Richard G./Robin] Gohan, Vegeta
SG13 The Cylon War by ShadowXV reviews
What happens when Earth is informed about a group of unknown humans by the Asgard and Earth with some help sneaks in an SG team. I got a new beta we are currently going through all chapters.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Chapters: 13 - Words: 126,291 - Reviews: 301 - Favs: 420 - Follows: 604 - Updated: 2/28/2019 - Published: 5/23/2015
The Laconian-Colonial War by DAWNWRIGHTER reviews
Mass Crossover! The Expanse, Halo, Mass Effect, Battlestar Galactica, Babylon 5, and Star Gate. After almost a century of expansion the Laconian Empire faces first contact with...humans? Massive AU OC characters!
Crossover - Halo & Battlestar Galactica: 2003 - Rated: M - English - Sci-Fi/Drama - Chapters: 3 - Words: 7,875 - Reviews: 8 - Favs: 31 - Follows: 44 - Updated: 2/25/2019 - Published: 2/10/2019
A Hero and the Straw Hat by Spartan of Chaos reviews
In order to prevent Maltruant from remaking the universe in his own image, Ben 10,000 is forced to take drastic measures. Now, thrust into an unfamiliar world Ben must learn to adapt to this strange new environment. For ill or good, Ben's presence will bring about an enormous change within a world plagued by pirates and a corrupt government.
Crossover - One Piece & Ben 10 - Rated: T - English - Adventure - Chapters: 12 - Words: 104,528 - Reviews: 131 - Favs: 251 - Follows: 247 - Updated: 1/4/2019 - Published: 5/26/2018 - unknown 1, Ben T., Vilgax, Eon
A Hope for the Future by zheuse reviews
The Endeavor Project was a chance for a father to give a future for his children and grandchildren, away from the chaos of the wars and governments of the Empire and New Republic. The politics may be different, but enemies will always exist, and maybe allies as well. PROLOGUE AND CHAPTER 32 POSTED
Crossover - Star Wars & Stargate: Atlantis - Rated: T - English - Sci-Fi - Chapters: 33 - Words: 80,117 - Reviews: 87 - Favs: 132 - Follows: 155 - Updated: 11/12/2018 - Published: 2/26/2018
Canaans' Fury by jahobes reviews
The factions of the Expanse meet the races of the Citadel Council. Expanse faction based on book 7 future history. They are heavily AU. While Citadel Races based on pre-first Contact War. HFY-
Crossover - Mass Effect & Expanse series - Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 3,787 - Reviews: 4 - Favs: 38 - Follows: 60 - Updated: 10/25/2018 - Published: 10/23/2018
A Chance Meeting by dunuelos reviews
This started as "Just a plot bunny." Galactica runs into Marcus shooting up asteroids. This drastically alters the Fleet's course, and adds a whole extra dimension to interstellar politics. Especially that disagreement between Earth and Babylon 5. Transection at BSG S2E15 "Scar" and B5 S4E13 "Rumors, Bargains, and Lies"
Crossover - Babylon 5 & Battlestar Galactica: 2003 - Rated: T - English - Drama/Sci-Fi - Chapters: 35 - Words: 136,872 - Reviews: 446 - Favs: 373 - Follows: 332 - Updated: 10/4/2018 - Published: 9/6/2018 - M. Cole, W. Adama, L. Adama/Apollo, T. Foster - Complete
The Achilles Stratagem by Lordheaven reviews
AU: The Doctor and Clara end on a derelict ship named USS Achilles at the end of the 24th century. They begin investigating the reason for its current predicament and find some interesting answers.
Crossover - Doctor Who & Stargate: SG-1 - Rated: K+ - English - Chapters: 12 - Words: 21,922 - Reviews: 49 - Favs: 54 - Follows: 100 - Updated: 9/18/2018 - Published: 1/12/2014 - Clara O., 12th Doctor, C. Mitchell, Vala - Complete
Amassing Humans by The new god reviews
What if the turians didn't meet the Human System Alliance instead they meet the militant fascist Terran Federation. Base on the first Starship Trooper film, no bugs.
Crossover - Starship Troopers & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 8 - Words: 13,196 - Reviews: 64 - Favs: 202 - Follows: 270 - Updated: 6/30/2018 - Published: 11/6/2016
Hour of the Wolf by Mountain King reviews
The Battle of Wolf 359, the Federation Fleet faces the monstrous Borg Cube in a desperate attempt to defend sector 001. All seems lost when an ancient warship, the last defender of a dying people, offers it's aid. Changing the destiny of the Alpha Quadrant forever.
Crossover - StarTrek: The Next Generation & Battlestar Galactica - Rated: T - English - Sci-Fi/Drama - Chapters: 44 - Words: 149,611 - Reviews: 571 - Favs: 312 - Follows: 413 - Updated: 6/28/2018 - Published: 6/4/2014
Halo Book I Valley of shadows by Jochern reviews
Escaping in the Normandy, Shepard and her crew was hit by the shockwave and somehow flung through space and time into another dimension entirely. They end up in 2551 and crash land on a planet under attack by Covenant forces. OC crew member involved. Alternative Universe story.
Crossover - Halo & Mass Effect - Rated: M - English - Family/Adventure - Chapters: 18 - Words: 53,133 - Reviews: 54 - Favs: 87 - Follows: 109 - Updated: 5/28/2018 - Published: 8/1/2016 - J. Garson, Garrus V., U. Wrex
Lords Of War by jahobes reviews
The Citadel is but a shadow of its former glory. The Terminus systems led by the Batarians and Salarians stand as the new masters of the Galaxy. Or so they thought? Heavily AU. Humanity based off of the Expanse T.V series. HFY.
Crossover - Mass Effect & Expanse - Rated: T - English - Sci-Fi/Drama - Chapters: 13 - Words: 15,121 - Reviews: 48 - Favs: 251 - Follows: 391 - Updated: 4/11/2018 - Published: 6/9/2016 - Garrus V., Liara T'Soni
First Contact: Colonial War by Apollonir reviews
A documentary that follows the most important battles, decisions and politics of what was dubbed the Great War by humanity, or the Colonial War by the Citadel, starting from Relay 314 to Armistice. The story of the bloodiest war in recorded human story, with a death toll in the billions. This is what happens when an unstoppable force meets an immovable object.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 4 - Words: 9,258 - Reviews: 74 - Favs: 219 - Follows: 283 - Updated: 3/22/2018 - Published: 1/2/2018
Awoken by BlackMacX reviews
In the void between galaxies, Destiny is boarded by a team of explorers. What will they find? This story contains SGU characters, though uses my OC character as the main focus. I hope you like it. **Please leave reviews and comments.**
Stargate: Universe - Rated: T - English - Friendship/Sci-Fi - Chapters: 10 - Words: 12,333 - Reviews: 10 - Favs: 16 - Follows: 17 - Updated: 1/3/2018 - Published: 5/18/2017
The Broken Bridge by Aenthir reviews
Mass Effect/Atlantis/SG-1. The ME galaxy is under siege by the Reapers, and the asari have discovered that the ancient artifact they've kept hidden away for centuries is a gateway that predates the Protheans. Will the gateway lead to new allies or more enemies for the already beleaguered Citadel races? Femshep/Liara, Garrus/Tali, Daniel J./?, Carter, Sheppard/Weir, McKay and more!
Crossover - Stargate: Atlantis & Mass Effect - Rated: T - English - Adventure/Romance - Chapters: 10 - Words: 28,651 - Reviews: 143 - Favs: 300 - Follows: 472 - Updated: 10/20/2017 - Published: 2/21/2014 - Rodney M., J. Garson, Liara T'Soni, OC
Bound By Destiny by JacGoBama16 reviews
The fate of two civilizations was decided a millennia ago. The plans of a now extinct race come to fruition as two societies separated for thousands of year meet. The Colonials erupt onto the galactic stage with a tenacious fury. The Galaxy prepares for war on all fronts and unseen forces watch from afar.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Drama - Chapters: 3 - Words: 36,745 - Reviews: 78 - Favs: 123 - Follows: 214 - Updated: 9/21/2017 - Published: 1/15/2017
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: 5314 - Favs: 1,568 - Follows: 1,475 - Updated: 5/25/2017 - Published: 3/20/2015 - Complete
The Terran Intervention by AmeliusTheAlteran reviews
It has been said that something as small as the flutter of a butterfly's wing can ultimately cause a typhoon halfway around the world. Now image what four massive EMPs could do in the midst of the Turian fleet above Shanxi. For want of a nail, civilizations will rise and fall. (REWRITTEN: Chapter 1-5)
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 23,683 - Reviews: 263 - Favs: 967 - Follows: 1,498 - Updated: 3/25/2017 - Published: 4/10/2016
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: 406 - Favs: 837 - Follows: 994 - Updated: 3/25/2017 - Published: 11/30/2014
Operation Exodus by zagor03 reviews
A few years before the fall of the Colonies a plan was put in motion in case the Cylons returned and destroyed everything; in order to ensure the survival of humanity. Operation Exodus starts a year and a half before the fall of the twelve colonies...
Battlestar Galactica: 2003 - Rated: K - English - Sci-Fi/Tragedy - Chapters: 37 - Words: 273,756 - Reviews: 222 - Favs: 323 - Follows: 315 - Updated: 3/20/2017 - Published: 8/11/2011 - Complete
Star Trek: Enterprise - In a Galaxy Far, Far Away by allen.bair reviews
The crew of the NX-01 are stranded across the universe and millions of years in the past in an experimental warp drive/hyperspace trial. They find themselves a long time ago in a galaxy far, far away... Contains crossover elements from Star Trek: Enterprise, the Star Wars movies and books, and Stargate: SG-1.
Crossover - Star Wars & StarTrek: Enterprise - Rated: K+ - English - Sci-Fi/Fantasy - Chapters: 11 - Words: 38,687 - Reviews: 13 - Favs: 33 - Follows: 31 - Updated: 2/10/2017 - Published: 10/15/2014
Stargate Omniverse by nestregge reviews
Continuing SG-A, SG-1, SG-U. starts at SG-A S5-E20, follows canon. I'll show how, using tech the heroes gained in the shows, they can defeat any bad guy they encounter, without suddenly giving them huge battle ships or tech that ignores the laws of physics. I'm going to expand on all the loose ends. The shows were just the beginning of this story. (Please, Please, Please review.)
Stargate: Atlantis - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 9 - Words: 26,883 - Reviews: 32 - Favs: 44 - Follows: 67 - Updated: 12/23/2016 - Published: 8/14/2016
Pandora's Scions by NorJC reviews
A Raptor discovers far more than a barely habitable planet inside a nebula after the small craft misjumps during Starbuck's search and rescue mission back to Caprica to retrieve Anders and his people. This is an AU from "Lay Down Your Burdens Part 1" and a crossover with "The Fleet" military/sci-fi anthology series by Bill Fawcett and David Drake.
Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 34 - Words: 119,525 - Reviews: 326 - Favs: 306 - Follows: 364 - Updated: 9/25/2016 - Published: 12/15/2013 - W. Adama, L. Roslin, D'Anna B., M. Edmondson/Racetrack
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: 293 - Favs: 469 - Follows: 690 - Updated: 9/5/2016 - Published: 12/14/2015
Mass Effect: Clash of Civilizations by Eterna1Soldier reviews
In 2157 a Citadel Council exploratory vessel is tasked with opening a dormant Relay into unknown regions of the galaxy. What they find is something they never expected. What happens when two civilizations centered around different technologies clash?
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Mystery - Chapters: 21 - Words: 96,812 - Reviews: 3481 - Favs: 5,657 - Follows: 6,556 - Updated: 5/22/2016 - Published: 10/13/2011 - Tali'Zorah
The Mass Effect Age by Tscorpio1701 reviews
It is a new age for the galaxy, an age of change, which leads to both pain and joy .
Crossover - Babylon 5 & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 8 - Words: 35,002 - Reviews: 200 - Favs: 467 - Follows: 528 - Updated: 5/22/2016 - Published: 3/10/2011
The Stargate Initiative by Sciencefictionsquirrel reviews
AU. In 1945, Ernest Littlefield ventures through the Stargate and manages to convey that he is alive via a radio set. This, coupled with a more intact Heliopolis, result in the development of the Stargate Initiative, dedicated to using the stargate for the benefit of the USA and mankind.
Stargate: SG-1 - Rated: T - English - Chapters: 20 - Words: 89,733 - Reviews: 204 - Favs: 503 - Follows: 546 - Updated: 5/6/2016 - Published: 7/4/2013
Codon Stream of Planet Vegeta by SaurusRock625 reviews
Betrayed by everyone he cared about, Ben Tennyson is left for dead in the vacuum of space. But when the Codon Stream merges with him and he is found and taken in by the Saiyan race, will the universe be destroyed? Or will Ben Tennyson rise as a new breed of hero? Which side will he choose? Hero or Destroyer? Life or Death? Human or Saiyan? WHY AM I ASKING YOU ALL! JUST READ ON!
Crossover - Dragon Ball Z & Ben 10 - Rated: T - English - Adventure/Fantasy - Chapters: 7 - Words: 6,361 - Reviews: 85 - Favs: 120 - Follows: 108 - Updated: 4/1/2016 - Published: 8/24/2015 - Ben T.
When Civilizations Meet by Generatedname reviews
The Ethereals, the Aquatoids, the Micronoids. Humanity has faced them all, and come out stronger. The Humans have left their world, exploring the stars, their technology built on Alien corpses. How will they react when they meet a peaceful society, one that is both advanced and primitive? ABANDONED, REWRITE IS UP UNDER THE TITLE 'THE HUMAN WAR!
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 52,325 - Reviews: 336 - Favs: 779 - Follows: 887 - Updated: 3/29/2016 - Published: 5/11/2014 - OC
The First Movement of the Odyssey by Crazy-88 reviews
"You are the Fifth Race. Your role is clear. If there is any hope in preserving the future, it lies with you and your people" Because all it takes is one ship. Perhaps in the wrong place... But unquestionably, at the right time.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 206,461 - Reviews: 303 - Favs: 900 - Follows: 998 - Updated: 12/1/2015 - Published: 7/15/2013
Organic toasters by Brian1972 reviews
The Cylons won the war and fled the nuclear wasteland that once were the 12 colonies. Between the stars they found earth and learned that not all humans hate them. A long time after unification they made contact with the Citadel. Turians were diciplined and First Contact went well until they infromed the Asari Ambasador about their history.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Sci-Fi/Drama - Chapters: 5 - Words: 18,464 - Reviews: 97 - Favs: 233 - Follows: 345 - Updated: 11/2/2015 - Published: 10/15/2015
lost colony by mls20012002 reviews
sword of the stars xover with new BSG rated t to be safe reedited as of 16/03/08
TV X-overs - Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 55,735 - Reviews: 75 - Favs: 68 - Follows: 82 - Updated: 10/12/2015 - Published: 7/21/2007
The Thirteenth Colony Series by sg07 reviews
Battlestar Galactica and Stargate SG1 Crossover - The Colonial Fleet has traveled in space for 25 yahren, continuing their search for the lost 13th Tribe. Vipers investigate a strange gravimetric distortion wave. Read more to find out!
TV X-overs - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 15 - Words: 177,389 - Reviews: 218 - Favs: 263 - Follows: 223 - Updated: 10/4/2015 - Published: 2/13/2003
Ra's Bane by maninblack5 reviews
In an abandoned Goa'uld archive, SG-1 finds mention of a race that once opposed the Goa'uld, now mentioned only in Jaffa legend. But they soon find that this race may still live...
Crossover - StarTrek: The Original Series & Stargate: SG-1 - Rated: T - English - Adventure/Sci-Fi - Chapters: 6 - Words: 7,683 - Reviews: 8 - Favs: 31 - Follows: 57 - Updated: 3/17/2015 - Published: 1/14/2015 - S. Carter, D. Jackson, J. O'Neill, Teal'c
A Brutal Truth by BIG Z1776 reviews
What are the chances of a technical screw-up bringing Earth and the Colonies together? Not very high, at least that's what Lt. Kelsey Adama thought. Yet, here she is, on the brink of history where two supposedly long lost tribes of man are reunited. But when both sides have not seen one another for thousands of years and one has no intention of playing by the rules things get messy
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Adventure/Sci-Fi - Chapters: 35 - Words: 211,291 - Reviews: 1053 - Favs: 789 - Follows: 775 - Updated: 2/17/2015 - Published: 4/30/2013 - 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: 278 - Follows: 338 - Updated: 2/17/2015 - Published: 5/20/2013 - D. Jackson, J. O'Neill, Rodney M., John S.
The Onyx Stars by The Hidden Sith reviews
A lost ship, a lost warrior, and a lost mind find themselves stranded in an unknown world. Full of vast wonders, threats, and opportunities, this new world is an unknown element for a crew accustomed to war and hardship. But, all Edens fall and beyond the embers of war lay the dawn of victory. Halo/Mass Effect AU John/Cortana, Lasky/Palmer
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 16 - Words: 143,775 - Reviews: 478 - Favs: 851 - Follows: 996 - Updated: 1/22/2015 - Published: 12/9/2012 - Master Chief/John-117
A Change of Fate by DX1998 reviews
While fleeing from the Ori after the death of their alllies, the Odyssey is near destruction. In a desperate bid for surviaval, a future version of Samantha Carter develops a plan to use the power of the Ori beam to save the ship. But it goes horribly wrong...now the cruiser is in a new reality, and a new war. Can they help their cousins in the UNSC? Or will the Covenant prevail?
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Adventure - Chapters: 29 - Words: 104,009 - Reviews: 771 - Favs: 1,065 - Follows: 1,033 - Updated: 10/7/2014 - Published: 1/17/2013 - S. Carter, Master Chief/John-117 - Complete
History Deferred by prometheus55 reviews
It's said that a single decision can alter the path of millions and the shape the galaxy. Most think those choices are epic struggles between good and evil. No one could have ever imagined that such a decision would have to do with the negligent placement of a simple wooden crate. Forty-seven years later the consequences of that decision have changed course of the entire galaxy.
Stargate: SG-1 - Rated: M - English - Adventure/Sci-Fi - Chapters: 7 - Words: 51,920 - Reviews: 186 - Favs: 470 - Follows: 561 - Updated: 10/1/2014 - Published: 8/23/2013 - S. Carter, D. Jackson, Teal'c
Finding Avalon by Naitch03 reviews
While hunting for more ZPM's for Atlantis, Dr. Jackson discovers hints to the location of the Ancient city of Avalon. Little did he know that his discovery would reunite the 13th colony with it's long lost bretheren. Stargate SG1 Atlantis nBSG xover
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: M - English - Adventure/Sci-Fi - Chapters: 18 - Words: 85,517 - Reviews: 432 - Favs: 575 - Follows: 728 - Updated: 9/21/2014 - Published: 9/11/2006 - Cassandra F., J. O'Neill, W. Adama, K. Thrace/Starbuck
Undiscovered Frontier Series Pilot - A Time For Heroes (Multiverse) by sbbigsteve reviews
Series Pilot - Seven friends make an extraordinary discovery: the legacy of a lost alien civilization that will change their lives forever. They will learn what it means to become heroes and take their first steps into a Multiverse of discovery and adventure. Come join this band of young heroes as they take their first steps into an Undiscovered Frontier...
Crossover - X-overs & TV X-overs - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 75,844 - Reviews: 1 - Favs: 19 - Follows: 15 - Updated: 7/6/2014 - Published: 6/30/2014 - Complete
Crisis Negotiations by Super duper Sumo reviews
"The Ceph were only the start. Their technology has guided us towards the stars. We are greater then we have ever been." But for humanity, the Ceph were only the beginning. Humanity is under attack. The stars hold many secrets. In times like this, humanity needs a leader. A icon. A role that Jacob Hargreave is not used to. But leading from the shadows has it's advantages.
Crossover - Mass Effect & Crysis - Rated: T - English - Sci-Fi - Chapters: 7 - Words: 27,954 - Reviews: 50 - Favs: 169 - Follows: 219 - Updated: 4/13/2014 - Published: 5/23/2013 - Conrad V., Jacob Hargreave
Where No Klingon has Gone Before by Kyosanim reviews
Q appears before a group of Klingon ships to declare that he judged their kind unworthy of continue to roam amongst the stars. However after many protests from the Klingons, Q then tells them that if they pass a test then he will review his decision. Will the Klingons be successful in this endeavor and therefore be free to travel wherever they please?
Crossover - StarTrek: Other & Babylon 5 - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 60,644 - Reviews: 133 - Favs: 94 - Follows: 143 - Updated: 3/25/2014 - Published: 4/7/2006
JLU: Ultimate Hero by Judge Royce reviews
When Ben is forcefully thrown into an alternate universe full of fellow superheroes, he'll have to deal with it the only way he knows how: by kicking butt and taking names. It's Hero Time. Co-written with sandman7734.
Crossover - Justice League & Ben 10 - Rated: T - English - Adventure/Friendship - Chapters: 1 - Words: 3,117 - Reviews: 69 - Favs: 184 - Follows: 185 - Published: 2/11/2014
Stargate: Rebirth by SkywalkerT-65 reviews
Rewrite of Stargate: Redemption. In an alternate take on 'Enemy at the Gate' the Wraith send more than one Super-Hive. Atlantis is destroyed, Earth and her allies culled to the brink of extinction. With no other choice, the last three ships are sent back in time, hoping to prevent this from ever happening. There, they will be left...until a fateful day when SG-1 stumbles upon them.
Stargate: SG-1 - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 11,182 - Reviews: 101 - Favs: 319 - Follows: 458 - Updated: 12/24/2013 - Published: 10/15/2013 - S. Carter, D. Jackson, J. O'Neill, Teal'c
This Is Not Our Fate by stevebond1990 reviews
A warship Jumps away from a losing battle to find itself in a familiar yet unfamiliar place. The crew find themselves and their new allies beset by forces that have long sought the destruction of Humanity. they're not going down without a fight.
Crossover - StarTrek: Enterprise & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 3,772 - Reviews: 30 - Favs: 51 - Follows: 82 - Updated: 12/23/2013 - Published: 1/10/2013 - J. Archer, W. Adama
Transition by Blad3Zer0 reviews
Never had the Cylons truly been challenged after the first rebellion. Yet when they discover a ship from the Thirteenth Tribe, they unwittingly step in the midst of a galactic war, with only a single, unlikely human to guide them safely through this Great Journey.
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Adventure/Mystery - Chapters: 10 - Words: 43,518 - Reviews: 113 - Favs: 179 - Follows: 267 - Updated: 12/20/2013 - Published: 6/26/2008 - OC, Number Six, D'Anna B., S. Valerii/Boomer
Bleach: Ultimate Alien Volume I by Bigby the Big Bad Wolf reviews
If Ben thought his life was crazy before, now he finds himself in the middle of a war between Soul Society and Hueco Mundo. But maybe, just maybe, Ben is the one who can make all the difference. The Final Chapter is up now. Discontinued. Remake is up.
Crossover - Bleach & Ben 10 - Rated: T - English - Adventure/Romance - Chapters: 18 - Words: 272,402 - Reviews: 539 - Favs: 733 - Follows: 376 - Updated: 11/3/2013 - Published: 6/10/2010 - Ben T. - Complete
Stargate: Redemption by SkywalkerT-65 reviews
This is a story set in an AU universe where the Ori win. Faced with certain death and destruction, the last two Tau'ri warships, Deadalus and Prometheus, use a dangerous Ancient device to try and fix this disaster. But who knows what can happen when you play with the timeline... In process of rewriting.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Drama - Chapters: 13 - Words: 38,964 - Reviews: 147 - Favs: 177 - Follows: 233 - Updated: 10/15/2013 - Published: 6/10/2012 - Complete
Halo Colonial Horizon by SpaceCowboy2013 reviews
A UNSC Cruiser escaping a deadly battle with the Covenant Onslaught and performing the Cole Protocol jumps into the middle of the Cyrannus Sector. But will the Covenant onslaught destroy the Colonials and the UNSC before they destroy each other? (CANCELLED, FOCUSING ON HALO THE IMPERIAL WAR)
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 93,820 - Reviews: 455 - Favs: 493 - Follows: 485 - Updated: 2/21/2013 - Published: 6/24/2011 - Kurt-051, W. Adama
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: 421 - Favs: 571 - Follows: 696 - Updated: 12/31/2012 - Published: 2/22/2010
The Consequences Of Not Being Polite by The Sidhe reviews
The Colonials finally encounter their long lost relatives. However, they find out that their cousins are not quite what they had expected. Now AU due to progression in the recent season.
Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 47 - Words: 266,212 - Reviews: 805 - Favs: 1,332 - Follows: 996 - Updated: 12/17/2012 - Published: 10/12/2006 - Complete
When Daedalus meets Enterprise by Major Simi reviews
Two great earth ships meet one meant purley for war while the other one one of exploration meet. The Daedalus gets transportet through a portal in the Star Trek universe. SGA corsover
Crossover - StarTrek: Enterprise & Stargate: Atlantis - Rated: K+ - English - Sci-Fi - Chapters: 8 - Words: 5,748 - Reviews: 58 - Favs: 61 - Follows: 72 - Updated: 2/4/2012 - Published: 6/12/2011
Reaper's Origin by prometheus55 reviews
After the battle with the Collectors, the Normandy tries to return to the Terminus systems. Unfortunately things don't go as planned and now the remnants of the crew must find a way home. However intentions and outcomes are rarely similar for Shepard. -ON HIATUS.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 128,713 - Reviews: 430 - Favs: 860 - Follows: 909 - Updated: 10/23/2011 - Published: 2/19/2010 - J. Garson
The Cold Open by V1p3r Mk7 reviews
Galactica finds a Mass Relay that connects humanity to Citadel Space. Brief First Contact War. Total rewrite of the story: now set just months before the fall. Not really a narrative: more like closely spaced snippets and POVs one after another.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 20,843 - Reviews: 35 - Favs: 74 - Follows: 118 - Updated: 9/19/2011 - Published: 3/10/2011
Red In Tooth And Claw by JA Baker reviews
When the crew of Galactica encounters the remains of the Forward Unto Dawn, life starts to get a lot more complicated for all involved, including an old enemy...
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 60 - Words: 139,295 - Reviews: 1593 - Favs: 1,341 - Follows: 1,006 - Updated: 3/13/2011 - Published: 2/12/2008 - [Master Chief/John-117, Cortana] - Complete
Daughter of Artemis by paganaidd reviews
Kara Thrace's trip down the celestial rabbit hole leads her to get spat out of the jump gate right beside former Earth Alliance Space Station Babylon 5.
Crossover - Babylon 5 & Battlestar Galactica: 2003 - Rated: T - English - Drama/Hurt/Comfort - Chapters: 13 - Words: 24,873 - Reviews: 167 - Favs: 218 - Follows: 296 - Updated: 12/3/2010 - Published: 3/15/2010
Return of the Reclaimer by wilkins75 reviews
Two years ago an Alien Ship was found and moved to a secret military base. On board was a person of unknown origins in armor frozen in time. Cylons are now preparing for their attack on the 12 Colonies of Man unaware of what is nearby watching.
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 63,448 - Reviews: 347 - Favs: 552 - Follows: 316 - Updated: 8/30/2010 - Published: 5/19/2010 - Master Chief/John-117 - Complete
Sorceress meets Andromeda by Tscorpio1701 reviews
Three Earth Alliance vessels get thrown into the Andromeda verse, how will the crew from the other universe adapt to their new home, and what adventures await them. On hold pending rewrite.
Crossover - Babylon 5 & Andromeda - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 7,594 - Reviews: 36 - Favs: 57 - Follows: 59 - Updated: 8/7/2010 - Published: 2/6/2010 - D. Corwin
ME meets ST by Lord Maximus reviews
What if not all of the Protheans died? What if they destroyed a Mass Relay in one system to save one race from their fate? What would be the result?
Crossover - Mass Effect & Star Trek: 2009 - Rated: T - English - Chapters: 22 - Words: 139,972 - Reviews: 260 - Favs: 641 - Follows: 399 - Updated: 7/26/2010 - Published: 4/22/2010 - Complete
The Best of both universes by Janusi reviews
A crossover between Babylon 5 and Star Trek. Stranded in another galaxy, Captain Walker must make a new home for his crew and fight ancient enemies. Chapters 40a is up at last! PERMANENT HIATUS
Crossover - Babylon 5 & TV X-overs - Rated: T - English - Chapters: 41 - Words: 154,042 - Reviews: 504 - Favs: 287 - Follows: 250 - Updated: 4/14/2008 - Published: 7/29/2004
Lost Kin by imjustaguy reviews
After over two millennia of separation humanity reunites among stars.
Battlestar Galactica: 2003 - Rated: T - English - Adventure/Drama - Chapters: 25 - Words: 58,213 - Reviews: 508 - Favs: 483 - Follows: 433 - Updated: 11/26/2007 - Published: 11/28/2004
The Enterprise Strikes Back by D. Marshall reviews
The Enterprise encounters two stranded spaceships from a galaxy far, far away.
Crossover - Star Wars & StarTrek: Enterprise - Rated: K+ - English - Drama/Friendship - Chapters: 11 - Words: 24,026 - Reviews: 146 - Favs: 138 - Follows: 58 - Updated: 10/25/2007 - Published: 10/3/2007 - Obi-Wan K., J. Archer - Complete
Homeworld Bound A SAAB NBSG crossover story Book 1 by JonHarper reviews
After 2yrs of running from the Cylons the Colonials are on the brink. Low on Food, Fuel and Morale they must play one last game of Cat and Mouse against the Cylons. Meanwhile Earth comes face to face against an enemy far more powerful than the Chigs.
TV X-overs - Rated: K - English - Sci-Fi/Adventure - Chapters: 14 - Words: 125,559 - Reviews: 120 - Favs: 186 - Follows: 116 - Updated: 3/17/2007 - Published: 4/15/2005 - Complete
A Universe of Change Ver 4A by AlbertG reviews
A Star Trek Babylon Five X-over. (Redone and Completetly re-edited) When the Enterprises C and D escaped thru the temporal opening, they entered a universe they never imagined and changed everything forever.
Crossover - Babylon 5 & StarTrek: Other - Rated: T - English - Sci-Fi/Adventure - Chapters: 24 - Words: 125,298 - Reviews: 343 - Favs: 330 - Follows: 134 - Updated: 9/29/2003 - Published: 4/2/2002 - Complete