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Enduring the Flames of War
by Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 49 - Words: 731,868 - Reviews: 2520 - Favs: 3,845 - Follows: 4,662 - Updated: 5/24 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
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: 28 - Words: 146,743 - Reviews: 422 - Favs: 349 - Follows: 400 - Updated: 5/18 - Published: 3/19/2017 - J. O'Neill, W. Adama
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: 32 - Words: 205,092 - Reviews: 938 - Favs: 588 - Follows: 713 - Updated: 4/5 - Published: 3/6/2016
The Final Circle
by Sufficient Velocity reviews
This is a Babylon 5 centered tale. It explores a BSG style exodus due to the loss of the Earth Minbari war. It becomes a crossover with nBSG as of Interlude 1, and crosses with Firefly as of Interlude 2. Most B5 and BSG canon should remain unchanged, including EU. However, Firefly will mostly use series and film canon. Its EU began to expand after I had already merged the plots.
Crossover - Babylon 5 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi - Chapters: 40 - Words: 475,371 - Reviews: 185 - Favs: 240 - Follows: 261 - Updated: 4/1 - Published: 7/13/2018
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: 29 - Words: 430,687 - Reviews: 502 - Favs: 502 - Follows: 563 - Updated: 3/26 - Published: 1/12/2017 - S. Carter, J. O'Neill
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: 2100 - Favs: 3,839 - Follows: 4,844 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Envirosuits and Doobies
by SympathyForTheQuarians reviews
After being exiled from known space following a disastrous failed colonization attempt, the Migrant Fleet makes First Contact with Earth in 1968. Chaos ensues. AU Historical First Contact, Humans/Quarians. It's finally fucking done.
Mass Effect - Rated: T - English - Humor/Drama - Chapters: 24 - Words: 45,720 - Reviews: 93 - Favs: 343 - Follows: 409 - Updated: 10/10/2022 - Published: 5/17/2019 - Complete
Mass Effect: The Iron Heart of Man
by Apollonir reviews
[AU] The Illusive Man said that salvation comes with a cost. When corruption seeps into the galaxy, when centuries of status quo suddenly breaks in a mere decade, when blood's spilled among the stars like never before, when extinction looms over civilization, when morality is merely a shade... salvation can only come with sacrifice. [AU First Contact War & Reaper War; GRAPHIC]
Mass Effect - Rated: M - English - Sci-Fi/Suspense - Chapters: 37 - Words: 389,709 - Reviews: 934 - Favs: 2,082 - Follows: 2,457 - Updated: 5/28/2022 - Published: 8/23/2016 - Admiral Hackett, Illusive Man, Shepard, OC
For Tomorrow We Die
by ElectricZ reviews
ME2- After surviving the Omega Four Relay mission, the Normandy returns to find the galaxy in political turmoil. Cerberus has been exposed, humanity has lost its council seat, and the geth offer a peace that no one seems to desire. To complicate matters, the Reapers are coming. Most characters present. AU as it invalidates Mass Effect 3. (Alternate ending begins chapter 84)
Mass Effect - Rated: T - English - Drama/Adventure - Chapters: 91 - Words: 299,465 - Reviews: 1088 - Favs: 1,022 - Follows: 771 - Updated: 3/6/2022 - Published: 12/29/2010 - Garrus V., Tali'Zorah, Legion, Shepard - Complete
by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 25 - Words: 656,164 - Reviews: 772 - Favs: 1,652 - Follows: 2,048 - Updated: 2/17/2022 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
The Unknown Defender
by Gabenator5 reviews
A new faction stirs, its green-clad enforcers seemingly unstoppable. Rumors spread, pirate bases go dark, and both the enslaved and kidnapped are discovered free. Who are these new interlopers, and what is their goal? For good or ill, the powers that be intend to find out. (REWORK IN PROGRESS)
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 18 - Words: 129,889 - Reviews: 1347 - Favs: 3,817 - Follows: 4,806 - Updated: 1/16/2022 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Leviathan
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: 2935 - Favs: 4,553 - Follows: 5,016 - 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: 730 - Favs: 2,519 - Follows: 3,343 - Updated: 11/27/2021 - Published: 7/14/2017 - Master Chief/John-117, J. Keyes, Miranda L., Shepard
Soon, everyone will hear the screams
by magkiln reviews
The Citadel Council doesn't want another conflict. Their reputation rests on their ability to maintain the peace. The Alliance of United Systems doesn't want another conflict. They won the last one, no need to risk spoiling their record. Shepard doesn't want another conflict. The last one was ugly enough. Unfortunately, it seems that some people didn't get the memo.
Crossover - Aliens/Predator & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 37 - Words: 164,619 - Reviews: 525 - Favs: 668 - Follows: 802 - Updated: 8/14/2021 - Published: 1/31/2018 - Predator/Yautja, Alien/Xenomorph, Saren A., 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: 740 - Favs: 2,935 - Follows: 3,557 - Updated: 8/1/2021 - Published: 3/8/2015 - Admiral Hackett, Shadow Broker, Shepard, Rachni Queen
Living an Indoctrinated Dream
by Aberron reviews
Sending Shepard back in time? Inefficient. Unlikely to produce significant changes to timeline. Sending the Illusive Man back in time? Difficulty level has increased. Jack Harper, The Illusive Man, is back where it all started. New Cerberus, New plan, and the Reapers watching, always watching. Sending a Hero back in time does nothing; Sending back this guy? Priceless. AU.
Mass Effect - Rated: M - English - Chapters: 93 - Words: 1,116,609 - Reviews: 938 - Favs: 1,445 - Follows: 1,503 - Updated: 6/17/2021 - Published: 6/16/2014 - Garrus V., Illusive Man, Shepard, Hannah S.
Mass Effect: Human Revolution
by IgnusDei reviews
Adam Jensen finds himself in a time only dreamed of in vids, humanity is now part of a great galactic community that fears synthetics, and he struggles to find his place within it. Note: Primarily a DX/ME crossover, with elements borrowed and integrated from other Square Enix franchises.
Crossover - Deus Ex & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 91 - Words: 876,978 - Reviews: 2700 - Favs: 3,012 - Follows: 3,056 - Updated: 6/14/2021 - Published: 3/12/2012
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: 1073 - Favs: 1,997 - Follows: 2,620 - Updated: 4/24/2021 - Published: 11/26/2013 - Master Chief/John-117, Cortana, J. Garson
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: 477 - Favs: 674 - Follows: 891 - Updated: 4/22/2021 - Published: 6/17/2018
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: 1,215 - Follows: 1,438 - 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: 4090 - Favs: 5,545 - Follows: 6,496 - Updated: 3/30/2021 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard
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: 2969 - Favs: 8,496 - Follows: 8,780 - Updated: 2/16/2021 - Published: 5/7/2013 - Complete
by GreaterGoodIreland reviews
The end of the Eden Prime War saw the liberation of Rannoch, humans on the Council, the revelation of the Reapers to the galaxy... and the 'assassination' of Shepard. Two years later, the Reapers still have not returned, the galaxy is on the brink of war yet again, and Cerberus knows more than it should. - AU ME2 with the background of Battlefield 2142 - HFY -
Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 45,643 - Reviews: 69 - Favs: 177 - Follows: 201 - Updated: 2/6/2021 - Published: 11/8/2017 - [Liara T'Soni, Shepard] OC
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: 461 - Follows: 477 - Updated: 1/23/2021 - Published: 6/1/2013 - Master Chief/John-117, C. Halsey, Cortana, John S. - Complete
by mp3.1415player reviews
Technological incompatibility can cause serious issues even at a simple level. When it comes to interstellar travel, those issues can be quite profound...
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 127,546 - Reviews: 935 - Favs: 3,772 - Follows: 4,352 - Updated: 1/5/2021 - Published: 8/18/2019
A Farmer's Tale
by alltheuntold reviews
A 30-year-old American farmer is sent to the world of ASOIAF. Follow as he tries to create a life for himself. Slow development & pacing. Slice-of-Life style story. Act 2 is complete, Act 3 is in progress.
A song of Ice and Fire - Rated: M - English - Fantasy/Family - Chapters: 138 - Words: 308,295 - Reviews: 2249 - Favs: 3,912 - Follows: 4,193 - Updated: 12/16/2020 - Published: 2/16/2018 - OC
The Fourth Council Race
by Knight Vigilant Koren reviews
A few minor and realistic changes in the decisions made by the leaders of humanity drastically altered the path of Citadel Space and the Reaper War. This is the story of caution and planning over recklessness, the path of the juggernaut over the glass cannon. This is the story of humanity as it should have been. A power worthy of its Council seat, and one the Reapers can't ignore.
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 29 - Words: 195,149 - Reviews: 1476 - Favs: 2,714 - Follows: 3,452 - Updated: 11/27/2020 - Published: 9/23/2017 - Garrus V., Kaidan A., Shepard, Councilor Irissa
The Catalyst For Revenge: Andromeda
by Jade Tatsu reviews
Andromeda has so many possibilities, good and bad. The Ascended go to Andromeda but no one knows what to expect? Emptiness? Empires? Enemies? Still, when the Ascended decide that a galaxy is theirs, you can rest assured, it is theirs. And no one stands in their way. Here are some possibilities for what might happen in Andromeda. AU
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 10,261 - Reviews: 76 - Favs: 232 - Follows: 254 - Updated: 8/27/2020 - Published: 10/10/2019 - Illusive Man, Harbinger, Shepard - Complete
The Guardian of Atlantis
by HuuskerDu reviews
The Guardian was left behind to protect the city until her people returned. After waiting for millennia she finally despaired, only to be re-awakened unexpectedly by strange humans from Earth who had shockingly interbred with her own race. Upset and confused, she takes control of the city from the humans as she plans her revenge against the Wraith. AU starting at ep 4.
Stargate: Atlantis - Rated: T - English - Sci-Fi/Romance - Chapters: 27 - Words: 234,195 - Reviews: 84 - Favs: 127 - Follows: 148 - Updated: 7/3/2020 - Published: 11/12/2018 - [Rodney M., OC] Elizabeth W., John S.
by CarnagexElite reviews
To the right person, a place like the Mass Effect universe is ripe for the picking. Success, strife and everything in between must be navigated in order to prepare for the ultimate threat; safety is an illusion. To hell with Shepard, you want to survive? You do it your own way, be a leader, not a lackey.
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 51,755 - Reviews: 71 - Favs: 223 - Follows: 312 - Updated: 4/28/2020 - Published: 9/27/2016
Dogs of War
by PunkMermaid reviews
In a world where the Relay 314 war led to the enslavement of humans to the turian empire, a jaded turian commander and young human slave must join forces to save the galaxy.
Mass Effect - Rated: T - English - Drama/Adventure - Chapters: 13 - Words: 67,230 - Reviews: 13 - Favs: 13 - Follows: 31 - Updated: 3/25/2020 - Published: 12/17/2019 - J. Garson, Garrus V., Kaidan A., Liara T'Soni
The Only Right Choice
by guubear reviews
Shepard was a total noob during the first play through. She made terrible choices, skipped quests, and she didn't buy any DLCs. Hopefully she would do a better job saving the galaxy at new game plus. Rate M for sex and violence.
Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 25 - Words: 219,558 - Reviews: 749 - Favs: 2,072 - Follows: 2,486 - Updated: 3/16/2020 - Published: 1/28/2016 - [Shepard, Liara T'Soni]
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: 583 - Favs: 2,349 - Follows: 2,816 - 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: 1221 - Favs: 1,453 - Follows: 1,745 - Updated: 11/18/2019 - Published: 4/23/2018
A Different Road Taken
by Redrover117 reviews
In 1928 an alien artefact was discovered in Egypt and activated for the first time a few years later. In one reality Doctor Littlefield stepped through and was stranded on the planet Heliopolis for decades. In this reality he arrived on another planet entirely, one that house an Ancient Repository.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 19 - Words: 54,169 - Reviews: 272 - Favs: 414 - Follows: 490 - Updated: 10/11/2019 - Published: 9/23/2018 - Complete
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: 4607 - Favs: 1,716 - Follows: 1,596 - Updated: 10/10/2019 - Published: 10/10/2016 - Ashley W., Illusive Man, Harbinger, Shepard - Complete
A Call to Duty
by Z98 reviews
Relations between the Terran Empire and the Citadel have been tense since the First Contact War, but efforts to reach amicable relations were bearing fruit. The discovery of a Prothean relic on Eden Prime offered another opportunity to improve relations, until things go badly awry. As Cadre, one of the emperor's chosen, Shepherd is charged with determining the truth, at any cost.
Mass Effect - Rated: T - English - Adventure - Chapters: 44 - Words: 349,243 - Reviews: 340 - Favs: 643 - Follows: 640 - Updated: 8/7/2019 - Published: 9/13/2017 - Complete
A Story of Domination
by KE12 reviews
I decided to try my hand at developing a timeline that would be feasible in the ME universe for a humanity that has been space faring for 50,000 years. So, look inside to see my own take on how a 50,000-year-old space capable humanity would develop and prepare the galaxy for the Reaper onslaught. Serious HFY! story. Complete
Mass Effect - Rated: K - English - Chapters: 9 - Words: 68,214 - Reviews: 192 - Favs: 928 - Follows: 843 - Updated: 4/17/2019 - Published: 12/2/2017 - Complete
The King in the Long Night
by Cap'n Chryssalid reviews
The War of Five Kings rages in Westeros. A bloody Civil War wracks Yi Ti. The Disputed Lands in Essos are aflame. In the night sky, a great Red Comet can be seen. Yet the comet is not the only visitor from deep space. For decades, the Commonwealth of Man has observed this far-flung system and finally, the order has come to begin the Uplift, whether the natives like it or not.
A song of Ice and Fire - Rated: T - English - Adventure - Chapters: 17 - Words: 116,159 - Reviews: 109 - Favs: 488 - Follows: 523 - Updated: 3/23/2019 - Published: 3/19/2019
A Battle of Wills
by insinr8 reviews
Following the destruction of the Temple Ship, humanity rises to become stronger than ever, and is determined that they will never again allow any enemy to repeat what the Ethereals did. In Vigilo Confido.
Crossover - X-Com & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 59 - Words: 262,053 - Reviews: 826 - Favs: 1,297 - Follows: 1,544 - Updated: 12/5/2018 - Published: 7/4/2015
Goddess of War
by Trojan Seeress reviews
A young woman from our world wakes up with the brain power of an A.I. in the tender care of Cerberus. Four years before Eden prime and unsure if she will make it that long, She sets out to prove her worth. Will she rise to glory like the phoenix or fall to rampancy like her forebears. Can a human A.I. truly survive or will her mind shatter from the strain of her intellect?
Mass Effect - Rated: T - English - Chapters: 6 - Words: 25,637 - Reviews: 114 - Favs: 374 - Follows: 538 - Updated: 11/26/2018 - Published: 4/10/2017 - J. Garson, OC
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: 1755 - Favs: 4,356 - Follows: 4,966 - Updated: 10/1/2018 - Published: 6/3/2014 - Master Chief/John-117, Cortana, Jon S., Eddard S./Ned
by WillProbablyWork reviews
Thought long gone for millennia, the missing races that have shaped multiple Galaxies are returning, can the newly raised Fifth Race survive it? SG-1, Atlantis, and Universe under one roof as well as some OC's. Starting off about mid season 1 SGU, Won't be changing anything about SGU.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 72,613 - Reviews: 50 - Favs: 85 - Follows: 122 - Updated: 7/8/2018 - Published: 2/17/2018
The Imperium of Mankind's Conquest
by The Bloody Chaos Lord reviews
The Imperium world of Maxia 9 is attacked and the Imperium will show no fear and they shall use this event to further their goals and power. Beware Enemies of Mankind your days are numbered. Hail the God-Emperor!
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 6 - Words: 26,392 - Reviews: 167 - Favs: 454 - Follows: 553 - Updated: 1/10/2018 - Published: 12/7/2016
by Cap'n Chryssalid reviews
A fun-loving asari mercenary finds herself a little in over her head when she ends up abducted by terrifying aliens from beyond the galactic frontier. These asari-like creatures call themselves 'humans.' They seem to be secretly nosing about on the borders of known space, acting through proxies, conducting covert operations, and they've got a deal for an enterprising asari...
Crossover - X-Com & Mass Effect - Rated: T - English - Humor/Sci-Fi - Chapters: 43 - Words: 387,570 - Reviews: 1431 - Favs: 3,822 - Follows: 4,363 - Updated: 1/2/2018 - Published: 7/19/2014 - U. Wrex, Daro'Xen, J. Garson, OC
An Unpleasant Surprise
by KE12 reviews
AU: After the first contact war Humans go into hiding before the council can begin peace talks, 200 years later a mysterious mechanical monster shows up in their space, and Shepard wants to know what it is, and if they should fear it.
Mass Effect - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 18 - Words: 59,086 - Reviews: 109 - Favs: 464 - Follows: 552 - Updated: 12/15/2017 - Published: 5/8/2017 - J. Garson, Garrus V., Liara T'Soni
How To Invade An Alien Planet
by roman566 reviews
Ah yes, Alien Invasions. The favorite past time of Always Chaotic Evil aliens. Mass Effect has couple of races like that. Surely such Sufficiently Advanced Aliens should have no trouble with conquering one Insignificant Little Blue Planet, right? It's not that the planet in question has faced so many failed invasion that the aliens inhabiting it wrote a guide to help invaders...
Mass Effect - Rated: T - English - Parody/Sci-Fi - Chapters: 1 - Words: 7,572 - Reviews: 65 - Favs: 288 - Follows: 247 - Published: 7/29/2017
Tango 'Til They're Sore
by FrankLeroux reviews
Chief Engineer Marcus Donnelly has to wrestle with the morality of doing good deeds while working for some pretty horrible people. He also somehow has to deal with the crazy biotic criminal who's taken up residence in Engineering. Rated M for oh so much language (because Jack) and for explicit sexy times and bloody violence later on.
Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 52 - Words: 282,415 - Reviews: 213 - Favs: 515 - Follows: 387 - Updated: 7/2/2017 - Published: 11/17/2016 - [Jack, OC] Garrus V., Shepard - Complete
All the Western Stars
by Sharrukin reviews
Centuries after the end of the Reaper War, Liara T'Soni has long since retired into the quiet of private life. Yet when new threats rise to threaten the galaxy's long peace, she is forced to fight once more. Can she and a new generation of allies win yet another desperate war? Final novel in the Memoirs continuity.
Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 60 - Words: 200,183 - Reviews: 630 - Favs: 322 - Follows: 276 - Updated: 12/20/2016 - Published: 5/17/2014 - [Liara T'Soni, Shepard, OC] - Complete
by Peptuck reviews
Mankind has survived its crucible, and while scarred and changed by the Ethereals, they advance into the cosmos. The galaxy beyond is a place of wonder and terror, of wealth and strife. Amid the threats and opportunities, both within and without, XCOM remains vigilant. Mass Effect/XCOM/Eclipse Phase/FEAR/Destiny fusion.
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 18 - Words: 170,804 - Reviews: 426 - Favs: 1,057 - Follows: 1,144 - Updated: 9/14/2016 - Published: 9/2/2014
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: 295 - Favs: 484 - Follows: 709 - Updated: 9/5/2016 - Published: 12/14/2015
From Hell's Heart
by gtamaster316 reviews
AU First Contact War. It was 48 years of endless slaughter and death. And from the pain and suffering of such unprecedented conflict, emerged an unprecedented plot, born of hate, to bring it all to an end...
Mass Effect - Rated: T - English - Sci-Fi/Tragedy - Chapters: 14 - Words: 75,788 - Reviews: 412 - Favs: 999 - Follows: 1,129 - Updated: 5/10/2016 - Published: 2/12/2012 - J. Garson, Garrus V.
Crucible - Super Weapon or Trap?
by BadLoki reviews
What if a certain someone that had been monitoring the Mass Effect reality had finally had enough? Mostly Mass Effect with a dash of Trek.
Crossover - StarTrek: The Next Generation & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 21 - Words: 90,576 - Reviews: 266 - Favs: 530 - Follows: 648 - Updated: 5/4/2016 - Published: 2/4/2016 - Q, Shepard, D. Anderson, Illusive Man
Silly but Killy
by Palladius reviews
What if there were no Humans in Mass Effect? What if there were Orks instead? The Council would have a lot less sleep, for one thing.
Crossover - Warhammer & Mass Effect - Rated: T - English - Humor/Sci-Fi - Chapters: 15 - Words: 47,002 - Reviews: 731 - Favs: 1,751 - Follows: 1,622 - Updated: 4/23/2016 - Published: 7/30/2014
A Dark Dawn
by Ave Imperium reviews
A new race was discovered and annihilated. A century passed and Citadel space forgot, but Humanity never did.
Mass Effect - Rated: T - English - Horror/Adventure - Chapters: 36 - Words: 143,972 - Reviews: 1036 - Favs: 2,339 - Follows: 2,204 - Updated: 4/12/2016 - Published: 8/21/2014 - Tali'Zorah, Shepard - Complete
The Lion Awakens
by Jaenera Targaryen reviews
Thirteen years have passed since the death of Emperor Reinhard the Invincible. Humanity has begin to rebuild, but tensions are high in the realm of the Golden Lion. But as new enemies emerge, and a bigger galaxy is discovered, it seems that the old adage may yet be true: only a common enemy can bring Humanity together.
Crossover - Legend of Galactic Heroes & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 38,303 - Reviews: 104 - Favs: 387 - Follows: 284 - Updated: 4/4/2016 - Published: 3/11/2016 - Complete
by ArcturusWolf reviews
Nirn has been unified under the banner of the Empire, and its subjects reach to the stars. Fearing contact by a hostile species, they build up their military might; what will happen when an intrepid Batarian slaver ring opens a Mass Relay and attacks this Empire? Will they ever accept peace? M: V/L
Crossover - Elder Scroll series & Mass Effect - Rated: M - English - Chapters: 25 - Words: 166,991 - Reviews: 556 - Favs: 1,398 - Follows: 1,382 - Updated: 3/11/2016 - Published: 7/24/2013 - Dragonborn/Dovahkiin, J. Garson - Complete
Worldwar: Missionaries Down to Earth
by AlbertG reviews
The Race has been freed from from the grip of Colonial conquest in less than two weeks. The writing is on the wall and now The people of Kobol must make nice with monotheistic Earth. How can they do that? Well, send missionaries! Book III-Colonials to the 13th colony, er Earth!
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 15 - Words: 93,138 - Reviews: 403 - Favs: 502 - Follows: 448 - Updated: 2/29/2016 - Published: 12/8/2014 - Complete
Guides for the Young
by NHunter reviews
Humanity makes an earlier first contact, and with a different race. Thus, the history is changed.
Mass Effect - Rated: T - English - Chapters: 5 - Words: 22,511 - Reviews: 224 - Favs: 1,252 - Follows: 1,506 - Updated: 1/28/2016 - Published: 9/24/2015
by Sable Cold reviews
The Tau'ri have a part to play in things to come.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Chapters: 19 - Words: 77,486 - Reviews: 373 - Favs: 793 - Follows: 876 - Updated: 12/31/2015 - Published: 8/8/2010 - Complete
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: 306 - Favs: 933 - Follows: 1,025 - Updated: 12/1/2015 - Published: 7/15/2013
by Tusken1602 reviews
I stumble upon a Prothean beacon, transporting me to the world of Mass Effect. Self-insert fic. Slightly AU. I do not own Mass Effect or any of its characters. I only own what I create. Rated M for language/violence/prob romance stuff. Please Rate and Comment! I welcome all ideas/criticism/comments! Thanks, guys! Complete. SEQUEL NOW UPLOADED: Beacon's Effect 2: Reborn.
Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 20 - Words: 112,550 - Reviews: 478 - Favs: 1,708 - Follows: 1,154 - Updated: 11/10/2015 - Published: 7/21/2015 - J. Garson, Liara T'Soni, OC - 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: 532 - Favs: 1,877 - Follows: 2,222 - Updated: 8/26/2015 - Published: 11/17/2014
by V-rcingetorix reviews
Humanity discovers the Prothean Ruins soon after the first Mars Colony. Discovery of alien life jumpstarts their space program ... and the saga begins. A series of cameos, covering approximately 50 years worth of various characters. Rated T for safety.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 27 - Words: 125,691 - Reviews: 574 - Favs: 1,016 - Follows: 937 - Updated: 8/21/2015 - Published: 6/15/2014 - D. Anderson, Admiral Hackett, Illusive Man - Complete
by joestej reviews
Millions of years ago, the Earth was ruled not by man, but by the fearsome creatures known as DINOSAURS! Now Earth's only hope for the future may lay in the secrets of its ancient past. Let the galaxy tremble, for our world's most ancient masters have finally returned. The Council is going to have a fit...
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 46,316 - Reviews: 232 - Favs: 852 - Follows: 992 - Updated: 7/31/2015 - Published: 2/20/2015
Child of the Virus
by Mr. Cloak reviews
Alex Mercer died 90 years after the second outbreak, of his own volition- self-imposed starvation. Now, one of his created children (Not necessarily good OC), finds himself living through the first contact war, and many other interesting events. May include romances, if I feel like it, and there will be Horrific violence. Updated to M Due to violence. KyWrds: Von Neumann, John, AU
Crossover - Mass Effect & Prototype - Rated: M - English - Adventure/Sci-Fi - Chapters: 27 - Words: 164,314 - Reviews: 396 - Favs: 1,086 - Follows: 979 - Updated: 7/26/2015 - Published: 4/28/2014 - J. Garson, Liara T'Soni, Tali'Zorah, OC - Complete
Smoke on the Water
by P.H. Wise reviews
Centuries after the Ethereal war, after humanity discovered a galaxy filled with alien life, after the defeat of Sovereign, the abductions have begun again. This time, entire human colonies are disappearing. And a reborn Commander Shepard and the long-thought defunct Extraterrestrial Combat Unit may be the only thing standing between humanity and extinction... (XCOM/Mass Effect)
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 8 - Words: 76,039 - Reviews: 48 - Favs: 193 - Follows: 270 - Updated: 7/17/2015 - Published: 7/19/2014 - J. Garson, Liara T'Soni, Miranda L.
We will Rise
by spectre4hire reviews
Shepard has been brought back to life. He awakens to a galaxy to discover all his hard work has been undone. The human led Council refuse to believe the Reapers, Cerberus seems more understanding than the Alliance, and the person responsible for bringing him back to life is his former lover-Miranda Lawson. Sequel to "I will Rise."
Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 16 - Words: 112,582 - Reviews: 177 - Favs: 244 - Follows: 240 - Updated: 7/8/2015 - Published: 3/28/2012 - [Miranda L., Shepard] Garrus V. - Complete
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: 1734 - Favs: 2,676 - Follows: 1,859 - Updated: 4/18/2015 - Published: 11/5/2014 - J. Garson, Harbinger, Garrus V., Saren A. - Complete
by crazyaolguy reviews
What if, the Whole SGC had been little more effective, little more emphasis on acquiring technology. Starts at Season 1 Enigma. This will follow Cannon when it's necessary. Think of butterfly effect. These characters are little different, they behave, act little differently. so the story unfolds a lot differently (Remember the butterfly) than cannon.
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 41,695 - Reviews: 106 - Favs: 282 - Follows: 358 - Updated: 3/8/2015 - Published: 1/26/2015
A Terraformer's Tale
by EgotisticalIndustries reviews
When eezo is completely missed by humanity and they get an extra 100 years to develop, they're far more noticeable on the galactic stage. This is despite the Mass Effect side running on Over Analysis rules, and therefore being much more powerful. Add to that some culture shock, and you've got a recipe for either disaster or awesome and I'm not sure which!
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 11 - Words: 19,843 - Reviews: 71 - Favs: 301 - Follows: 390 - Updated: 2/9/2015 - Published: 1/22/2015
by edclancer001 reviews
Alternate Universe to the canon Mass Effect Universe. This story takes place in "our" timeline, as such, Mass Effect games and other Mass Effect works exist and are known by humanity. How has humanity moved to prepare the galaxy in the 70 years since the discovery that fiction had become fact? Will eventually reach the Mass Effect time period.
Mass Effect - Rated: M - English - Sci-Fi - Chapters: 17 - Words: 77,485 - Reviews: 367 - Favs: 1,127 - Follows: 1,362 - Updated: 2/8/2015 - Published: 11/2/2013 - Shepard
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: 479 - Favs: 872 - Follows: 1,016 - Updated: 1/22/2015 - Published: 12/9/2012 - Master Chief/John-117
Children of Nemesis
by Solaris242 reviews
There was a theory once, about Nemesis, the Dark Star. Stillborn twin to the sun, it wandered the void, black and cold, and every 25 million years, came back home. AU.
Mass Effect - Rated: K+ - English - Chapters: 3 - Words: 11,142 - Reviews: 290 - Favs: 1,345 - Follows: 1,591 - Updated: 1/15/2015 - Published: 9/11/2013
The Ongoing Journey
by Senrab Nomis reviews
Atlantis has been on Earth for two months. Now the gang are eager to get back to Pegasus and to take the city they call home with them. But the Pegasus galaxy has more secrets than they imagine and many hidden threats. They will soon learn there are things hiding in the shadows that they never expected to encounter. AU. Chapter 1 now rewritten.
Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 90 - Words: 447,198 - Reviews: 888 - Favs: 501 - Follows: 523 - Updated: 12/25/2014 - Published: 8/14/2010
by EgotisticalIndustries reviews
The Quarians made their Migrant Fleet out of desperation. We made ours out of paranoia and a refusal to be stuck with only a handful of habitable planets. Canon plot rails? We don't need no stinkin' plot rails! DEAD FIC
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 23,656 - Reviews: 97 - Favs: 187 - Follows: 220 - Updated: 11/26/2014 - Published: 10/17/2014
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: 699 - Follows: 597 - Updated: 10/11/2014 - Published: 3/16/2010 - Complete
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: 777 - Favs: 1,104 - Follows: 1,054 - Updated: 10/7/2014 - Published: 1/17/2013 - S. Carter, Master Chief/John-117 - Complete
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: 189 - Favs: 489 - Follows: 573 - Updated: 10/1/2014 - Published: 8/23/2013 - S. Carter, D. Jackson, Teal'c
A strange twist of fate
by Lucas43 reviews
A Confed battle group is trying to destroy a strange ship. And when it does, the people of the battle group find out how fickle the fates can be.
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 69 - Words: 164,266 - Reviews: 613 - Favs: 228 - Follows: 259 - Updated: 8/12/2014 - Published: 5/17/2005
by artistic mishap reviews
A strange explosion rocks the Presidium, and the woman found in the epicenter sends shockwaves ripping through the galaxy. With the recently acquired Prothean beacon slowly killing her, Shepard knows this woman is the key to defeating the Reapers. She knows, because this woman claims the impossible: that she's also Commander Shepard.
Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 12 - Words: 120,892 - Reviews: 155 - Favs: 185 - Follows: 251 - Updated: 6/4/2014 - Published: 11/21/2012 - J. Garson, Garrus V., Kaidan A., Liara T'Soni
Stargate: The Rise of Terra
by Lord Knightsky reviews
With Earth in the possession of the Asgard Core as well as Atlantis and the Alteran Database on Earth it is now time for humanity to unite. Terra will rise to follow in the wake of the Ancients and travel the Universe to discover its secrets.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Sci-Fi - Chapters: 8 - Words: 56,270 - Reviews: 56 - Favs: 217 - Follows: 270 - Updated: 3/13/2014 - Published: 4/25/2012 - J. O'Neill, S. Carter/Sam
The Empire of Man
by Holland93 reviews
Humanity's reaction to the discovery of the archives on mars was very different from what happened in the games. The militaristic Empire of man is preparing to expand. But how will they react when they discover that they are not alone in the galaxy. And more importantly. How will the galaxy respond to humanity? First contact story. Rated T for language and gore update this week.
Mass Effect - Rated: T - English - Drama - Chapters: 12 - Words: 100,952 - Reviews: 472 - Favs: 861 - Follows: 964 - Updated: 2/5/2014 - Published: 6/16/2013
Tactical Advantage Available
by SPEC OPS STG reviews
(REWRITTEN) The art of war always changes, never staying the same. Though in this case humanity is the only race able to keep up with evolution.
Crossover - Mass Effect & Crysis - Rated: M - English - Sci-Fi - Chapters: 10 - Words: 48,004 - Reviews: 218 - Favs: 390 - Follows: 442 - Updated: 1/25/2014 - Published: 7/8/2013
Mass Effect: The First War
by ProfFartBurger reviews
The Prothean Ruins weren't. They contained little more than mentionings of an Alien Society; as a result, humanity develops on a completely different path than what was intended, and when first contact is made not with the Turians, but a desperate, destitute race viewed as beggars and thieves, how will this dying race change Humanity? And how will Humanity change the Galaxy? *A/U!*
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 200,906 - Reviews: 1934 - Favs: 4,133 - Follows: 2,995 - Updated: 1/12/2014 - Published: 1/26/2013 - OC - Complete
Coming of the Ancients
by Shadowz081 reviews
Centuries after the end of the great war, the UNSC and Neo-covenant now live in peace, but what happens when they discover not just one but two splinter fraction of humans? The System Alliance and their Citadel and Prehistoric humanity and their old allies. But with their welcoming appearance, so will ancient threats loom around the corner ready to wage war...
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 74,425 - Reviews: 302 - Favs: 715 - Follows: 770 - Updated: 1/4/2014 - Published: 9/19/2012
Babylon 5: A new beginning
by Nairda reviews
2233, Eight months after the fall of Omelos. A thorough study of the Dilgar war is finished and changes the forward looking strategy of the Earth Alliance. "This story changes the time line of the Babylon 5 universe after the Dilgar War."
Babylon 5 - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 100,426 - Reviews: 301 - Favs: 477 - Follows: 481 - Updated: 12/9/2013 - Published: 9/6/2010
Reunions are a Deleted
by Bob Regent reviews
Name amended due to guidelines. A clash of ideologies will cause widespread death and destruction for two races both alike and strange to the other. SG1nBSG xover
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 27 - Words: 349,784 - Reviews: 1013 - Favs: 1,433 - Follows: 1,384 - Updated: 11/23/2013 - Published: 5/19/2007
A Fighting Chance
by Lord of Misrule reviews
An Alternate history of the Earth Minbari war. Earth finds an unexpected ally who provides a way to beat Minbari Stealth giving humanity a chance to fight back.
Babylon 5 - Rated: T - English - Sci-Fi/Drama - Chapters: 14 - Words: 95,817 - Reviews: 189 - Favs: 484 - Follows: 453 - Updated: 10/13/2013 - Published: 9/25/2011
XCOM: Second Contact
by Agayek reviews
With the destruction of the Temple Ship humanity knew peace. XCOM never forgot their motto however, 'always vigilant, always reliable'
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 294,105 - Reviews: 1161 - Favs: 2,552 - Follows: 2,651 - Updated: 9/15/2013 - Published: 1/1/2013
The Matrix Effect
by unity9 reviews
Imagine what if the Human/Machine war ended with a truce and humans merged with the machines only to find a Mass Relay many years later. Read as humans explore this relay and find out where this rabbit hole will take them.
Crossover - Matrix & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 41 - Words: 150,280 - Reviews: 333 - Favs: 719 - Follows: 552 - Updated: 8/28/2013 - Published: 5/29/2012 - Neo, Shepard - Complete
Cause and Mass Effect
by claihm solais reviews
Mass Effect is a great game. A fun game. But the fun and games stop when it all becomes real...when I find myself on the Citadel, with the terrible knowledge of what's coming. Can one person really make a difference? I'm sure as hell going to try, because the Reapers aren't taking over this galaxy on my watch.
Mass Effect - Rated: T - English - Adventure/Romance - Chapters: 44 - Words: 281,689 - Reviews: 1114 - Favs: 1,625 - Follows: 1,723 - Updated: 8/24/2013 - Published: 7/5/2012 - J. Garson, Miranda L.
by Animus of Masada reviews
An asari exploration vessel discovers Earth in the 2030's...and the first contact scenario has incredible implications for both species. What does humanity look like through alien eyes? Where do they go from here? /-AU: no Reapers, completely disconnected from the plot of the games, but mostly faithful to the setting. Told from many points of view.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 16 - Words: 51,333 - Reviews: 1397 - Favs: 3,278 - Follows: 3,281 - Updated: 4/10/2013 - Published: 8/12/2011
The Fourth Option
by commandocucumber reviews
Post ME3. Shep/Miri & a little rebuilding. Cover art by Skllhrt. Check out his profile please! :)
Mass Effect - Rated: T - English - Chapters: 32 - Words: 103,996 - Reviews: 683 - Favs: 609 - Follows: 399 - Updated: 2/12/2013 - Published: 3/10/2012 - Shepard, Miranda L. - Complete
Chaos Effect: First Contact
by Freeride600 reviews
The team of Asari commandos and a human seems unlikely. And while a tight-knit squad is formed, the galaxy remains as troubled as ever. So enjoy the good times while they last…because it's only a matter of time until the tempest hits.
Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 61 - Words: 452,887 - Reviews: 249 - Favs: 210 - Follows: 155 - Updated: 2/1/2013 - Published: 1/29/2011 - Complete
The Babylon Effect
by andrewjameswilliams reviews
Mass Effect/Babylon 5 Fusion. When Earth discovered the Prothean cache on Mars it began a sequence of events that will change humanities destiny and the fate of the galaxy forever.
Crossover - Babylon 5 & Mass Effect - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 13 - Words: 89,041 - Reviews: 353 - Favs: 747 - Follows: 789 - Updated: 1/4/2013 - Published: 4/2/2011
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: 808 - Favs: 1,376 - Follows: 1,025 - Updated: 12/17/2012 - Published: 10/12/2006 - Complete
Exodus of Stars
by keiranhalcyon2010 reviews
Aleksandr Kerensky has led the war weary Star League Defense Force on a two year long journey into exile. A chance decision leads to a long awaited discovery, and final proof that humanity is not alone in the cosmos.
Crossover - Mechwarrior/Battletech & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 12 - Words: 73,164 - Reviews: 273 - Favs: 929 - Follows: 896 - Updated: 12/5/2012 - Published: 7/4/2011
Stargate: Do Over
by chain.reader reviews
On March 1st, 1991 the world is visited by hundreds of Puddle Jumpers. Jack, Sam and Daniel mess with time. How will things change now that they know what they know?
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 34,397 - Reviews: 64 - Favs: 143 - Follows: 190 - Updated: 10/6/2012 - Published: 8/31/2012
What The Future Brings
by Real Teagy SOT reviews
Only 5 years after the End of the Human-Covenant war does Humanity meet another alien Civilization. but this one has different technology and hasn't heard of the Forerunners. Is this one open to peace at first contact? or will Humanity be bludgeoned by outside forces yet again?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 17 - Words: 54,286 - Reviews: 386 - Favs: 557 - Follows: 540 - Updated: 8/28/2012 - Published: 7/18/2012 - Master Chief/John-117, Shepard
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: 768 - Follows: 521 - Updated: 8/6/2012 - Published: 4/16/2012 - J. O'Neill - 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: 891 - Follows: 601 - Updated: 4/16/2012 - Published: 4/29/2011 - Complete
by Peptuck reviews
He's on a suicide mission, and Shepard needs all the help he can get. One of his potential recruits is a strange young scientist specializing in synthetic lifeforms - a scientist who is not at all what she seems, and knows far more than she lets on...
Crossover - Mass Effect & Terminator: Sarah Connor Chronicles - Rated: T - English - Sci-Fi/Drama - Chapters: 4 - Words: 28,355 - Reviews: 163 - Favs: 592 - Follows: 664 - Updated: 2/9/2012 - Published: 9/20/2010 - Shepard, Cameron
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: 494 - Updated: 2/6/2012 - Published: 2/20/2010
Stargate: New Frontier
by andrewjameswilliams reviews
AU Stargate. What could have happened if the stargate had never been discovered. How would things be different for Humanity and the Goa'uld when they finally meet.
Stargate: SG-1 - Rated: K+ - English - Chapters: 13 - Words: 82,722 - Reviews: 349 - Favs: 745 - Follows: 811 - Updated: 12/14/2011 - Published: 3/1/2008
Mass Effect: A new past
by Bombsquad reviews
A different history to Mass Effect in which Human technology develops along different lines than anything the Citadel knows...an Alternative History of Mass Effect.
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 137,294 - Reviews: 718 - Favs: 1,890 - Follows: 1,130 - Updated: 5/18/2011 - Published: 12/11/2010 - Complete
XSGCOM: Terra from the Deep
by Hotpoint reviews
Crossover between SG1 and XCOM. As old enemies fall by the wayside new ones appear to challenge the Tau'ri and their allies.
Stargate: SG-1 - Rated: T - English - Adventure - Chapters: 19 - Words: 153,663 - Reviews: 427 - Favs: 813 - Follows: 696 - Updated: 5/3/2011 - Published: 1/3/2010
The Dawn of Angels
by keiranhalcyon2010 reviews
Humanity finds itself in a wondrous and dangerous new Universe. They have been given the chance for a fresh start and begin the difficult journey to shoulder the Legacy of both the Asgard and the Alterans.
Crossover - Stargate: SG-1 & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 23,769 - Reviews: 328 - Favs: 964 - Follows: 1,029 - Updated: 8/2/2010 - Published: 4/17/2010 - J. Garson
XSGCOM: Mirror Image
by Hotpoint reviews
Crossover between SG1 and XCOM. As Earth fights against two separate extraterrestrial threats the defenders join forces and the tables are turned.
Crossover - Stargate: SG-1 & X-Com - Rated: T - English - Adventure - Chapters: 52 - Words: 349,026 - Reviews: 873 - Favs: 1,229 - Follows: 689 - Updated: 12/30/2009 - Published: 7/2/2007 - Complete
by keiranhalcyon2010 reviews
Something has changed in our distant past. We are totally different. We have created a near Utopia. We have already begun the exploration of space. What we found in the final frontier was not what we hoped for. Our dreams of a peaceful Universe shattered.
Stargate: SG-1 - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 33,622 - Reviews: 267 - Favs: 578 - Follows: 587 - Updated: 9/6/2009 - Published: 2/21/2009
Worldwar: Discovering the Balance
by AlbertG reviews
Fleetlord Atvar, supreme commander of 'The Race' arrived at Earth a few decades later than planned. But it shouldn't have mattered after all how much could Earth change in a mere 800 years, give or take?
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Fantasy - Chapters: 10 - Words: 64,273 - Reviews: 314 - Favs: 716 - Follows: 409 - Updated: 6/27/2009 - Published: 11/5/2007 - Complete
The Dilgar War
by Lord of Misrule reviews
It was the event that started it all. Thirty years before Babylon 5 the Dilgar race launched an Invasion of League space, a war which would cost Billions of lives, whole races destroyed and at the end give birth to a new super power The Earth Alliance
Babylon 5 - Rated: T - English - Drama/Adventure - Chapters: 104 - Words: 1,222,457 - Reviews: 258 - Favs: 471 - Follows: 230 - Updated: 8/19/2008 - Published: 9/26/2005 - Complete
Chronicles of the Crusade Book 2: The Long Road
by JonHarper reviews
Draal and Atlantis point the way to P3X 7171 a world that may hold the key to beating the Drahk plague. SG1 is reformed with the task of finding it setting off a chain of events that will lead both Earths down the long painful road to deliverance.
TV X-overs - Rated: K - English - Adventure - Chapters: 11 - Words: 107,028 - Reviews: 109 - Favs: 191 - Follows: 206 - Updated: 5/10/2008 - Published: 9/5/2006
Chronicles of the Crusade Book 1: The Gateway
by JonHarper reviews
The Earth Alliance has been attacked by the Drahk leaving Earth Quarantined with the Plague. As the ISA searches the Galaxy looking for a cure help comes from a most ulikely source. Stargate Command.
TV X-overs - Rated: T - English - Adventure/Drama - Chapters: 21 - Words: 128,936 - Reviews: 222 - Favs: 284 - Follows: 158 - Updated: 8/23/2006 - Published: 10/4/2005 - Complete
Those Who Stand
by AlbertG reviews
The B5StarTrek crossover. The Armageddon Conflict continues in Chapter 26. Janeway and her crew are here. Londo has made it to Centauri Prime and so have the Minbari! The tides of war are beginning.
Crossover - Babylon 5 & StarTrek: Other - Rated: T - English - Sci-Fi/Adventure - Chapters: 58 - Words: 266,425 - Reviews: 585 - Favs: 253 - Follows: 120 - Updated: 3/31/2006 - Published: 10/31/2003 - Complete
Still Not in Kansas
by Soledad reviews
A Babylon5 - Star Trek Voyager crossover, based on the events of the 3rd season episode 'Grey 17 is Missing'. Story complete.
Crossover - Babylon 5 & StarTrek: Voyager - Rated: T - English - Adventure/Romance - Chapters: 21 - Words: 74,376 - Reviews: 219 - Favs: 243 - Follows: 107 - Updated: 11/7/2004 - Published: 3/27/2004 - L. Alexander, Vir, Chakotay, Kes - Complete