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Alternate First Contact War
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Focus: Games Mass Effect, Since: 01-19-11
Founder: Relvain Jenafuse - Stories: 469 - Followers: 445 - Staff: 17 - id: 88942
This community is for stories with the First Contact War in it, the war can be against the System Alliance or an alternate Human Civilization. This community will accept any story and All Ratings are accepted. Even if the story has only one long chapter with the First Contact War in it then it is acceptable for this community.

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Please Note: I don't actively search through the database for any stories, so send me a link if you find any, or I will just upload the newly published

The Gamer of Change by Sechs reviews
Reincarnation can either go wrong or right. Max Winston was just your average game fanatic, until the day he dies and his reborn in the Mass effect Universe with The Gamer power/slight crossover with Naruto and Halo. (AU, rating may change)
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 6 - Words: 21,727 - Reviews: 179 - Favs: 454 - Follows: 597 - Updated: 8/13 - Published: 10/24/2015 - [OC, Shepard (F)]
New Humanity Challenge by deathgrips099 reviews
For those of you who love alternate humanity fanfics like me but are tired of the same basic humanity you have found a challenge for you. Interested? Well if you are come take a peek at an idea for a humanity you haven't seen before.
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 459 - Reviews: 6 - Favs: 7 - Follows: 10 - Published: 2/26 - Complete
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: 16 - Words: 54,422 - Reviews: 81 - Favs: 219 - Follows: 291 - Updated: 9/13 - Published: 5/8 - Shepard (F), Garrus V., Liara T'Soni
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.
Mass Effect - Rated: T - English - Sci-Fi/Drama - Chapters: 11 - Words: 12,319 - Reviews: 17 - Favs: 90 - Follows: 164 - Updated: 6/11/2016 - Published: 6/9/2016
The Inheritance of Man: First Contact by DanishCookie reviews
Humanity is at war – with none other than itself. The United Earth Republic is fighting a grueling war against the Colonial Liberation Front, dubbed the "Insurgency." When Relay 314 is opened, however, humanity must face reality – there's a whole galaxy out there, with sentient aliens waiting for them. How it will affect their own civil war is yet to be seen. Massively AU.
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 4 - Words: 19,207 - Reviews: 28 - Favs: 122 - Follows: 217 - Updated: 9/16 - Published: 5/8 - Shepard (F), Admiral Hackett, Shepard (M), OC
Mass Effect: Chimera by RedLightningD608 reviews
During the First Contact war, a virus was unintentionally unleashed upon humanity, a virus that wiped out the entire species within 3 years... The council memories the race, declaring it a galactic tragedy that a young race died so in-expectantly... However Humanity isn't as dead as they seem, but life as a parasite species can be rough. ( possible rewrite )
Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 40,938 - Reviews: 52 - Favs: 136 - Follows: 196 - Updated: 7/31 - Published: 6/18 - Shepard (F), Joker, Jack
The Boundary Effect by Touhoufanatic reviews
2137 When an Alliance exploration ship is fired upon by a Turian cruiser, it shall unleash them upon the galaxy, and the Galaxy is not ready for their power, their abilities, or their lack of common sense! Human/Youkai/Lunarian Alliance. Mass EffectXTouhou Crossover AU. Too many characters to write. Please enjoy and review.
Crossover - Mass Effect & Touhou Project - Rated: T - English - Sci-Fi/Fantasy - Chapters: 16 - Words: 117,154 - Reviews: 182 - Favs: 382 - Follows: 492 - Updated: 9/10 - Published: 5/13
Enigma by ElwynZ reviews
The name 'Enigma' is one that is whispered all across the galaxy. It is both respected and feared - someone who rivals the Shadow Broker himself in the field of information brokering. Many things about him are unknown - who he is, his motives, his origins. But one thing is certain: he is not from this universe. SI. Main story is consistent, potential AU deviations elsewhere.
Mass Effect - Rated: T - English - Adventure - Chapters: 9 - Words: 20,848 - Reviews: 46 - Favs: 216 - Follows: 327 - Updated: 8/10/2015 - Published: 12/23/2014 - Shepard (F), Shadow Broker, OC
Pathfinder by Andrithir reviews
Alone and adrift in Andromeda, the crew of the Hyperion find themselves in the war fought between a ferocious theology and the UNSC, a human faction that is different and yet unnvervingly similar to the Systems Alliance.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,722 - Reviews: 45 - Favs: 142 - Follows: 235 - Published: 3/22 - Master Chief/John-117, Scott R.
The Reincarnation of Zero by AdmiralAtvar reviews
Lelouch was prepared for the zero requiem. But when he discovers that not only is humanity not alone in the universe, but that there is a whole galaxy where the strong oppress the weak? Prepare yourself galaxy for zero is coming and he going to change everything. 1st fan-fiction, irregular updates and lots of Lelouch kicking ass.
Crossover - Code Geass & Mass Effect - Rated: T - English - Chapters: 2 - Words: 2,948 - Reviews: 20 - Favs: 107 - Follows: 144 - Updated: 3/17 - Published: 3/10
Alternative Humanity - The Lost Sol: Redux by The Glorious Reader reviews
What would life entail with the disappearance of the sun? How would humans survive in a world without the very thing that sustains life as we know it? How would this upbringing effect the mass effect universe a whole when humans enter the galactic fold? Heavily based off of Orez Lanrete's original story, which he has allowed me to work on and continue.
Crossover - Mass Effect & Lost Planet - Rated: T - English - Sci-Fi/Fantasy - Chapters: 1 - Words: 5,077 - Reviews: 62 - Favs: 281 - Follows: 378 - Published: 3/9
First Contact War: 2021 by Kspence92 reviews
What if Humanity's First Contact War had not been fought with the Turian Hierarchy? What if we were discovered first and by a race even more bloodthirsty? In June 2021, the Batarians arrived at Earth and meet a woefully unprepared humanity...
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 18 - Words: 20,448 - Reviews: 69 - Favs: 101 - Follows: 162 - Updated: 8/31 - Published: 2/27
A Million to One by Flick262 reviews
In 1890 the Martians invaded Earth, in 1940 Earth invaded Mars. Humanity has never been the same. Told from the views of people (and aliens) on the ground, this is a compiled history of Humanity from the Martian invasion and leading up to the Shepherd's Sacrifice and perhaps beyond.
Mass Effect - Rated: T - English - Adventure/Parody - Chapters: 5 - Words: 18,771 - Reviews: 22 - Favs: 92 - Follows: 127 - Updated: 8/27 - Published: 3/8
Mass Effect: Escherian Era by Akallas von Aerok reviews
First Contact AU: What would you do if you find out that you were revived from death by moving your consciousness into a robotic body and then also learn that your descendants have established an interstellar empire that bows to no one? That's my situation right now. My name is David Escher Senior, and welcome to my rather turbulent second life.
Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 50,740 - Reviews: 152 - Favs: 382 - Follows: 481 - Updated: 4/29 - Published: 2/15
Resurgent civilization by Startraveler93 reviews
What happens when a Prothean plan to steal the citadel brings it to another races home world? Will this species develop differently?
Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 8 - Words: 39,257 - Reviews: 70 - Favs: 273 - Follows: 338 - Updated: 12/18/2016 - Published: 12/22/2015
Upstarts by Covviz reviews
2257 CE. Citadel Space is going through an era of stagnation, but also one of relative peace and stability... Until a major faux pas by the Batarian Hegemony threatens to plunge it and a new galactic power into an all-out war, one which could bring an end to the peace which the Council has been trying so hard to uphold.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 12,192 - Reviews: 43 - Favs: 178 - Follows: 262 - Updated: 5/6 - Published: 1/15
Time Effect by Halofan5695 reviews
Once the war with the Reapers fails in the current timeline. They travel back in time seventy thousand years before the Reapers came to harvest mankind. Leading to the events that are about to unfold.
Mass Effect - Rated: K - English - Sci-Fi - Chapters: 1 - Words: 1,359 - Reviews: 7 - Favs: 27 - Follows: 28 - Published: 1/22 - OC - Complete
Halo Mass Effect : Colonial War by tobiisagoodboy94 reviews
When a research ship finds a anomoly at the edge of Harvests system, a young militiaman and the whole UNSC are thrown into a galaxy much larger than they could have dreamed. Pre-war UNSC, with a mixture of Halo and Mass Effect characters and some OCs, all fighting for humanitys and maybe, if time and money is left over, the Citadels future.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 38,472 - Reviews: 53 - Favs: 99 - Follows: 138 - Updated: 2/26 - Published: 1/11 - T. Lasky, OC, Garrus V., Shepard (M)
Reploid Nation by Zealswordsmen reviews
When a group of quarians reach a schorched Earth and find Dr. Light capsule, the scales of power in the galaxy are bound to change. *English is not my native language, so be prepared for a bumpy ride trought grammar. However I'm trying my best to make it a enjoyable reading for you all. Have Fun.*
Crossover - Mega Man & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 10 - Words: 55,211 - Reviews: 120 - Favs: 207 - Follows: 177 - Updated: 8/14/2015 - Published: 5/13/2015 - X, Zero, Alia, U. Wrex - Complete
The Rise of Humanity by TheExiledStoryTeller reviews
What would happen if Earth and the Human Systems Alliance was replaced with Lordran and an empire of soul consuming Undead with unnatural physical prowess, Humans, and Demons all of which can use magic which almost all of their tech utilizes? Can the other races survive the encounter? Lets find out. Rating may change to M later on.
Crossover - Mass Effect & Dark Souls - Rated: T - English - Sci-Fi/Fantasy - Chapters: 8 - Words: 35,894 - Reviews: 106 - Favs: 336 - Follows: 423 - Updated: 11/17/2016 - Published: 10/17/2016
Revenge of the Fallen by Legendary Junk Mail reviews
Extinct Humanity AU: With the Supreme Prothean Empire broken, and the Combined Systems Alliance about to follow, the legendary Normandy Crew is chosen to be the revenge of their cycle. Fifty thousand years later, Spectre Garrus Vakarian and his rag-tag crew fight a failing battle against the Reapers, and eventually crash on an uncharted planet, unaware of what they will discover.
Mass Effect - Rated: T - English - Sci-Fi/Drama - Chapters: 8 - Words: 45,248 - Reviews: 108 - Favs: 380 - Follows: 585 - Updated: 8/6 - Published: 4/10/2016 - [Garrus V., Tali'Zorah] Shepard (F), Liara T'Soni
Against the Odds by Agentweapon Proelium-Tempus reviews
The Insurrection killed millions, but Humanity recovered. The Human-Flood War killed billions, but Humanity prevailed. Humanity again stands alone in the face of both persistent and threatening rivals. They are outnumbered and outgunned and are against tenacious opposition, but then again, Humanity has always had the ability for surviving the impossible. Heavy AU
Crossover - Halo & Mass Effect - Rated: T - English - Suspense/Humor - Chapters: 5 - Words: 21,745 - Reviews: 88 - Favs: 413 - Follows: 590 - Updated: 11/28/2016 - Published: 8/20/2016 - Master Chief/John-117, OC, Shepard (F), Illusive Man
Dawn of a New Age by The Best of Luck reviews
Earth has been united by a combination of the Sole Survivor, the Lone Wanderer, and the Courier. As the United Earth Government, the Dominion of New Vegas, and the Enclave of Luna expand their horizons, they come into conflict with the Citadel Alliance. Times are changing and it is the dawn of a new age for the galaxy.
Crossover - Fallout & Mass Effect - Rated: T - English - Humor/Drama - Chapters: 2 - Words: 7,329 - Reviews: 9 - Favs: 81 - Follows: 118 - Updated: 9/2/2016 - Published: 8/18/2016
Battlestar Effect by 6747 reviews
what happens when you mix a slightly in the future Earth, Cylon's and Colonail's together in the Mass effect universe.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Chapters: 2 - Words: 6,329 - Reviews: 19 - Favs: 63 - Follows: 96 - Updated: 8/26/2016 - Published: 7/3/2016
Shattered Beliefs (Abandoned) by Barrybumhead reviews
"After the Great War the Unified Alliance is formed ushering a new golden age of both technology and Economy, But what happens when another first contact goes bad? How will humanity react to another possible Great War? And how will the Council react when all their Beliefs about technology are shattered?"
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 4 - Words: 8,085 - Reviews: 30 - Favs: 107 - Follows: 158 - Updated: 6/12/2016 - Published: 3/6/2016
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