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XCOM: Remnant Unknown by DrAmishMD reviews
The sequel to XCOM: RWBY Within. Teams RWBY and JNPR return to Remnant in time for the Vytal Festival. They're relieved to finally have their lives get back to normal after nine months on war-torn Earth, but is the life of a huntsman ever truly normal?
Crossover - X-Com & RWBY - Rated: M - English - Adventure/Sci-Fi - Chapters: 43 - Words: 413,141 - Reviews: 981 - Favs: 1,007 - Follows: 1,189 - Updated: 8/31 - Published: 7/22/2016 - Team RWBY, Team JNPR
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 362,913 - Reviews: 456 - Favs: 739 - Follows: 973 - Updated: 8/27 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard (F)
The Reclamation has already begun by Fade Maybe reviews
The Citadel Council and the Systems Alliance fight for survival against the Reaper onslaught. However, the UNSC, politically divided and still recovering from the Didact's assault discovers a Mass Relay that will force them into the fight and change the course of galactic history forever. The Reclamation has already begun, and we are hopeless to stop it. ME3/post Halo 4
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 36 - Words: 355,591 - Reviews: 1086 - Favs: 1,193 - Follows: 1,552 - Updated: 8/23 - Published: 3/13/2013
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: 28 - Words: 197,715 - Reviews: 944 - Favs: 1,494 - Follows: 1,965 - Updated: 8/21 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
To Infinity 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: 46 - Words: 390,407 - Reviews: 3556 - Favs: 4,076 - Follows: 4,895 - Updated: 7/25 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard (M)
Book One: Dawn of a New Age by DragonheartODST reviews
Humanity had been expanding across the stars for over 5 centuries in relative peace. But an alien alliance known as the Covenant wishes to destroy humanity entirely. Now threatened with extinction, can the fate of just one battle-scared survivor change the events of the war and those participating in it? Multi-crossover with Halo, Mass Effect, and a little bit of StarCraft.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 13 - Words: 131,084 - Reviews: 285 - Favs: 290 - Follows: 345 - Updated: 7/14 - Published: 5/19/2016
Mass Effect: Shadow of the Sith by SomeGuyOverHere reviews
Commander Shepard has fought slavers, Geth, Collectors, and Reapers. Now a mysterious faction called the Sith Empire makes itself known. Led by Emperor Revan and the Emperor's Wrath, it attacks and declares war on the Citadel species. Will Shepard be able to save his galaxy from this new threat and still be ready for the coming of the Reapers?
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 282,912 - Reviews: 276 - Favs: 358 - Follows: 444 - Updated: 6/20 - Published: 5/30/2017 - Revan, Sith W., Shepard (M)
Mass Effect: The New Journey by Arashi the Solar Phoenix reviews
During a Joint Deployment, the UNSC Infinity and Her Sangheili allies are suddenly thrown into a new Galaxy, and end up near Charon before the Systems Alliance discovers the Charon Relay. Alliances are forged and how will the galaxy react to an aggressive humanity that not only doesn't use Mass Effect technology, but will not let anyone stand in their way of expansion? AU PreME1
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 190,674 - Reviews: 1324 - Favs: 2,208 - Follows: 2,702 - Updated: 6/11 - Published: 1/26/2014
DOOM Effect by zrocker119 reviews
Alexander Carter was a normal man that lived a normal life. That is until he was hit and killed by a drunk driver. Now dead he is offered a chance by a powerful being to be a part of something much that he thought only existed in fiction. Mass Effect SI story with the MC starting out in DOOM 2016. Rating should be for obvious reasons. Pairings have been decided.
Crossover - Mass Effect & Doom - Rated: M - English - Adventure/Sci-Fi - Chapters: 15 - Words: 57,757 - Reviews: 589 - Favs: 1,636 - Follows: 1,945 - Updated: 3/25 - Published: 6/25/2016 - Shepard (F), Miranda L., OC
The Unknown Defender by Gabenator5 reviews
While Shepard is closing in on Saren. Stories begin to spread among the pirates and slavers of the galaxy. Rumors of a nameless fear, of a creature, a demon wreathed in green armor. It and its allies appear from nowhere slughtering all who oppose them, then vanish without a trace. What is the purpose of this unknown faction... and what will they do next?
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 17 - Words: 115,734 - Reviews: 1006 - Favs: 2,632 - Follows: 3,438 - Updated: 1/13 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Shepard (F), Tali'Zorah
The Lost Civilization by Apollonir reviews
After the Battle of the Ark, a UNSC Pelican dropship crash lands on Thessia. Two ODSTs survive the crash and make contact with primitive Asari. Ninety thousand years later, Liara T'Soni discovers a strange looking aircraft and Human remains in an ancient cave burial chamber. The discovery she makes will take the Asari on a journey to discover their true lineage.
Crossover - Halo & Mass Effect - Rated: T - English - Mystery/Suspense - Chapters: 8 - Words: 15,182 - Reviews: 411 - Favs: 1,268 - Follows: 1,838 - Updated: 1/6 - Published: 7/2/2017 - Ashley W., Liara T'Soni, Mordin S., Shepard (M)
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: 1565 - Favs: 3,422 - Follows: 4,028 - Updated: 10/1/2018 - Published: 6/3/2014 - Master Chief/John-117, Cortana, Jon S., Eddard S./Ned
The Strange Ship by regularmother reviews
In a hunt for raw materials for their people, Quarian explorers open a new mass relay. What awaits them on the other side is nothing they could have ever expected. Pre-Mass Effect 1, Post-Halo 4; AU only where necessary to mash two universes together and create something resembling a coherent storyline.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 48,490 - Reviews: 274 - Favs: 923 - Follows: 1,416 - Updated: 9/4/2018 - Published: 10/25/2016
Beyond The Veil by NaniteSystems reviews
After the Battle of Hogwarts Harry finds himself rising through the ranks of the Ministry's Unspeakables. All is well until one day a strange set of runes carved into the base of the Veil of Death catches his eye. After a hint from the Hallows, Harry steps through the Veil and into a strange new world. But not all is as it seems. Threats both old and new lurk in the darkness.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 21 - Words: 192,665 - Reviews: 934 - Favs: 3,880 - Follows: 5,036 - Updated: 6/26/2018 - Published: 9/2/2016 - [Harry P., Shepard (F)]
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: 80 - Follows: 107 - Updated: 5/28/2018 - Published: 8/1/2016 - Shepard (F), Garrus V., U. Wrex
Star Effect: Deep Space 9 by NYKevin reviews
The Defiant enters the wormhole and emerges from a mass relay orbiting the Citadel. Takes place during ME2 and ME3. The Star Trek half looks like season 5 or 6 but isn't specified. Also has Fem!Shep/Garrus, but mostly off-screen, and not really the focus of the fic. T for language. Updates have become irregular lately.
Crossover - StarTrek: Deep Space Nine & Mass Effect - Rated: T - English - Drama/Humor - Chapters: 45 - Words: 86,547 - Reviews: 75 - Favs: 102 - Follows: 152 - Updated: 3/13/2018 - Published: 9/14/2013 - E. Garak, Nog, Shepard (F), Joker
Whispers of Darkness by Darthkvzn reviews
Billions have died, but their sacrifices have brought the known races of the galaxy freedom. Their destiny is theirs to command, and peace, albeit a somber one, reigns unchallenged. The cosmos is full of constants, however, and death is the most prominent of them all. *Set after ME3 and LotV, spoilers* (MULTICROSSOVER WITH HALO)
Crossover - StarCraft & Mass Effect - Rated: T - English - Chapters: 24 - Words: 57,929 - Reviews: 219 - Favs: 267 - Follows: 348 - Updated: 2/17/2018 - Published: 12/7/2015
The Fist of Remnant by BrightestDarkness reviews
In the ruined crater that once held the Forever Fall, forces beyond Remnant's comprehension are stirring. Well, maybe more strolling around looking for Udon and the way home than stirring but that's beside the point; a bald justice has emerged into Remnant with his sidekick, seeking justice and defending the weak. After they fix the moon first that is.
Crossover - RWBY & One Punch Man/ワンパンマン - Rated: T - English - Humor/Parody - Chapters: 32 - Words: 146,555 - Reviews: 698 - Favs: 1,660 - Follows: 1,819 - Updated: 1/28/2018 - Published: 1/1/2016 - Ozpin, Team RWBY, Saitama, Genos
Fraught with Peril: A Halo Mass Effect Story by A-01 reviews
John was born for war, and even in the wake of defeating the Didact, there will be no respite. Thrust into the Mass Effect Universe he must either find his place or find his way home as his presence brings new hope to Shepard and his campaign against the approaching Reaper armada.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 15 - Words: 151,659 - Reviews: 233 - Favs: 602 - Follows: 812 - Updated: 1/28/2018 - Published: 12/16/2016
Psi Effect 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: 1367 - Favs: 3,352 - Follows: 3,880 - Updated: 1/2/2018 - Published: 7/19/2014 - U. Wrex, Daro'Xen, Shepard (F), OC
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: 140 - Favs: 283 - Follows: 451 - Updated: 10/20/2017 - Published: 2/21/2014 - Rodney M., Shepard (F), Liara T'Soni, OC
Xcom: Incursion by Drewman784 reviews
Every race thus far has utterly failed to stop the Reapers, always embroiled in pesky politics and wars to take any notice of the coming storm. This time though...this time is different. Can you feel the equally raging storm coming? I can. Can you? Side story: Incursion: Alliance Effect *Earlier chapters rewritten. Discontinued*
Crossover - X-Com & Mass Effect - Rated: T - English - Suspense/Adventure - Chapters: 11 - Words: 39,880 - Reviews: 127 - Favs: 264 - Follows: 341 - Updated: 8/3/2017 - Published: 11/28/2015
A Dark Rising by RedShirt1453 reviews
36 years have passed since the end of the First Contact War after humanity achieved a costly victory against the Citadel Council. Now humanity struggles to maintain control of its status as the sole galactic superpower fighting off Resistance and Internal Struggle. Meanwhile Dark Forces are at work seeking to quicken humanity's downfall and plunge the galaxy into chaos.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 18 - Words: 89,926 - Reviews: 125 - Favs: 92 - Follows: 101 - Updated: 5/25/2017 - Published: 11/7/2016 - J. Keyes, P. Stacker, OC, Liara T'Soni
Wing Commander: End of an Era by Worth a Shot reviews
A/U for both wing commander and mass effect: The timelines of Mass Effect and Wing Commander are changed forever when the Kilrathi make a startling discovery at the edge of their empire. This story will contain a number of well known characters from both games. Starts in the middle of ME2 and will continue on through ME3.
Crossover - Wing Commander & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 31 - Words: 383,307 - Reviews: 313 - Favs: 258 - Follows: 304 - Updated: 5/25/2017 - Published: 7/19/2013
Reclamation: Genesis by DragonsManticoresAndGiantsOhMy reviews
Massively AU. Halo/Mass Effect merged continuity. The galaxy, like much of the universe, is in a constant cycle of birth, destruction and rebirth. No guarantee our civilization is any different. We know others have come before us and perished at their height. What destroyed them? Could it destroy us as well? One human might be our savior, but he needs to grow up a bit first.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 38 - Words: 566,188 - Reviews: 98 - Favs: 151 - Follows: 173 - Updated: 5/2/2017 - Published: 7/14/2014 - Shepard (M)
First Contact by Shadythief reviews
When the SSV Normandy becomes lost in space, they chance upon an undiscovered system. They find an unknown race, who use strange technology previously thought impossible. Could these aliens be the key to a far off future war? Or will they only cause more destruction?
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 7 - Words: 30,619 - Reviews: 78 - Favs: 219 - Follows: 299 - Updated: 12/31/2016 - Published: 3/18/2016 - Arbiter, Shepard (F), Garrus V.
Halo-Mass Effect: Altered-Destiny (Being Rewritten) by Azores reviews
This story has been discontinued. A rewrite is being made, starting with Halo-Mass Effect: Salvation's Light. (Out Now) Thank you everyone for all the support you've shown! It really means a lot. -Azores
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 15 - Words: 100,046 - Reviews: 353 - Favs: 672 - Follows: 858 - Updated: 12/15/2016 - Published: 1/25/2015 - J. Cutter, P. Cole, U. Wrex, Aria T'Loak
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: 19 - Words: 181,564 - Reviews: 341 - Favs: 1,028 - Follows: 1,262 - Updated: 11/26/2016 - Published: 3/2/2015 - Cortana, Shepard (F)
Drifting fleet by Hassarn reviews
After an anomaly shows up in middle of Turian space, followed by a massive dead fleet from an unknown race, the future of Mass Effect universe will be re-written. Up for adoption. Message me for details
Crossover - Mass Effect & Sins of a Solar Empire - Rated: T - English - Sci-Fi/Fantasy - Chapters: 5 - Words: 9,655 - Reviews: 27 - Favs: 112 - Follows: 139 - Updated: 11/18/2016 - Published: 7/2/2016
Divergent Pasts by JLake4 reviews
The Cycle marches ever onward. 100,000 years ago a race virtually unknown to Citadel space established an Empire that spanned the galaxy. Two Cycles later, their ruins gave rise to a Covenant bound in their worship. These aliens evolved outside of the Reapers' plan, and now threaten to upset it as their gods had eons before. (Rewrite in progress!)
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 14 - Words: 57,096 - Reviews: 173 - Favs: 172 - Follows: 195 - Updated: 10/4/2016 - Published: 11/19/2013 - Arbiter, Ashley W.
Red Cobra by Billybobjoe47s reviews
Last time the UNSC discovered a mysterious alien artifact, the Halos came within seconds of activating. Every problem the UNSC has had in the last 50 years has been because of aliens and their blasted artifacts. So when a newly-surveyed system holds a mysterious artifact, there is great cause for worry. Operation RED COBRA is intended to remedy that worry- by any means necessary.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 30,732 - Reviews: 200 - Favs: 589 - Follows: 831 - Updated: 9/29/2016 - Published: 1/6/2015 - Master Chief/John-117, T. Hood
The Halo Effect by Agentweapon Proelium-Tempus reviews
The UNSC dispatches a small task force to investigate an artefact with origins not of the Orion Arm. The Citadel Races, including the Systems Alliance, are in for an eye opener when two new players in galactic prowess are not only technologically superior but also not bound by the Element Zero and its constraints. Rated T for reasons. AU in both Halo and ME events.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Humor - Chapters: 16 - Words: 50,729 - Reviews: 373 - Favs: 1,220 - Follows: 1,549 - Updated: 9/26/2016 - Published: 8/6/2015 - Master Chief/John-117, OC, Shepard (F)
Vigil 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: 427 - Favs: 955 - Follows: 1,048 - Updated: 9/14/2016 - Published: 9/2/2014
The System Alliance gets a new upgrade by charly120 reviews
Humanity is still in the sol system but not for long and Jane Shepard's Grandparent's meet. War breaks out, the council gets ignored. Athena meets Arachnids from starship troopers. Does not follow cannon completely and is AU. It has Halo references and a few other genre's rated M for future chapter content. I DO NOT OWN MASS EFFECT/HALO/STARSHIP TROOPERS. MEANT FOR MATURE AUDIENCES
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 13 - Words: 59,564 - Reviews: 51 - Favs: 225 - Follows: 223 - Updated: 8/20/2016 - Published: 4/11/2015 - P. Cole, Shepard (F), Liara T'Soni, Admiral Hackett
Infinity by casquis reviews
Space is infinite, but under the right conditions even a galaxy can feel too small.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 8 - Words: 51,961 - Reviews: 253 - Favs: 379 - Follows: 534 - Updated: 8/19/2016 - Published: 10/12/2015
Alpha and Omega Book 2: The Fallen by Xed Alpha reviews
Having been cast down at the conclusion of his battle with the Leviathans, Shinji Ikari finds himself caught between his new world and an old one that looks suspiciously familiar. And while he may be trapped with only one companion, a certain someone universes away prepares to go to any lengths to see his return. Rated M to be safe
Crossover - Evangelion & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 16 - Words: 220,040 - Reviews: 615 - Favs: 1,084 - Follows: 1,068 - Updated: 7/30/2016 - Published: 1/24/2014 - [Shinji I., Aria T'Loak]
A Feeling of Importance by LebendenToten reviews
One seemingly normal highschool student one day, a Spartan II on his way to save the galexy with Commander Shepard and crew the next. Andrew doesnt know what the hell he has gotten himself into...(SI) This is my first Fanfic so be nice :P and constructive criticism/suggestions welcome! Rated T mainly for language, was M before.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Friendship - Chapters: 22 - Words: 38,586 - Reviews: 175 - Favs: 270 - Follows: 347 - Updated: 5/24/2016 - Published: 11/6/2014 - Master Chief/John-117, C. Halsey, OC, Shepard (F)
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: 3394 - Favs: 5,053 - Follows: 5,932 - Updated: 5/22/2016 - Published: 10/13/2011 - Tali'Zorah
More Than Human by Dysentia reviews
Three Heroes, different realities, different times. All of them are more than human. Mass Effect, Halo and Crysis crossover. M for swearing/cursing.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 7,630 - Reviews: 46 - Favs: 114 - Follows: 182 - Updated: 4/12/2016 - Published: 12/5/2012 - Master Chief/John-117, Shepard (F)
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: 334 - Favs: 741 - Follows: 852 - Updated: 3/29/2016 - Published: 5/11/2014 - OC
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: 18 - Words: 40,604 - Reviews: 2082 - Favs: 6,469 - Follows: 7,482 - Updated: 3/1/2016 - Published: 5/7/2013
The Technological Assimilators by Knight in Blackest Armor reviews
With the technologies of several alien races at its disposal, humanity had undergone a technological revolution. It advanced at such a rapid pace, far exceeding many expectations. Soon however, the humans learned that they shared their galaxy with yet another group of sentient alien life, but to mankind's horror and confusion, these aliens were not the sort they expected at all.
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 147,111 - Reviews: 230 - Favs: 819 - Follows: 1,102 - Updated: 9/5/2015 - Published: 3/20/2014
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: 47 - Favs: 192 - Follows: 263 - Updated: 7/17/2015 - Published: 7/19/2014 - Shepard (F), Liara T'Soni, Miranda L.
Dawnhammer by Ace Warbringer reviews
For the crew of the Matriarchs Light, the day was going to hell. For the Dawnhammers refit voyage, new things are about to occur. For when the Matriarchs Light opens a relay, chased by a Reaper. One ship will stand and face a new world. (Now continued!)
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 9,180 - Reviews: 39 - Favs: 117 - Follows: 154 - Updated: 5/18/2015 - Published: 3/29/2015
Mass Effect: Records of an Irken Defective by KiwiDayDreams reviews
An Irken stasis pod is discovered on Earth and Shepard finds herself saddled with the megalomanic Irken, Zim. Things become more complicated when they discover Zim's home planet has been reaped during Zim's stint on Earth. Set post ME2/IZ end.
Crossover - Invader Zim & Mass Effect - Rated: T - English - Adventure/Horror - Chapters: 18 - Words: 77,574 - Reviews: 267 - Favs: 515 - Follows: 474 - Updated: 5/6/2015 - Published: 6/10/2010
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: 470 - Favs: 800 - Follows: 936 - Updated: 1/22/2015 - Published: 12/9/2012 - Master Chief/John-117
Enemy Returned by Palladius reviews
The Ethereal assault on Earth was foiled by Colonel Jane Shepard. The Temple Ship taken intact, XCOM gained the capability to strike back against the Ethereals. However, Humans weren't the only species the Ethereals had set their sights on. For they were determined to make this cycle different.
Crossover - X-Com & Mass Effect - Rated: M - English - Sci-Fi/Family - Chapters: 38 - Words: 161,748 - Reviews: 1015 - Favs: 1,123 - Follows: 1,279 - Updated: 1/17/2015 - Published: 10/3/2013 - Shepard (F), U. Wrex, Tali'Zorah, Admiral Hackett
For Fleet and Flotilla - ON PERMANENT HIATUS by CAS2109 reviews
When the crew of the BattleStar Hades discover unknown debris and a massive structure while on the run from a Cylon fleet, they find themselves thrown onto the galactic stage. How will they adapt to the new challenges thrown at them? Will they ever retake the colonies? Or will they find themselves drawn to a certain race of nomads who share their hate of Artificial Intelligence?
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 39,552 - Reviews: 72 - Favs: 163 - Follows: 228 - Updated: 10/23/2014 - Published: 1/13/2014 - OC, Tali'Zorah, Admiral Hackett
N-117 by jcrighter reviews
After going through the Forerunner Interstellar Bridge and defeating Saren together, Chief and Shepherd must find the Focus Icon and the second Bridge. Only problem is that the Collectors have the Icon in their base. Chief must help Shepherd assemble a team strong enough to travel through the Omega-4 Relay if he ever hope of finding the Icon and returning home.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,004 - Reviews: 11 - Favs: 38 - Follows: 50 - Updated: 7/28/2014 - Published: 7/18/2014 - Master Chief/John-117, Cortana, Shepard (M)
Night Life by NGTM-R reviews
Because when your leader has had her brain altered by outside forces, eventually someone must ask the awkward question: What exactly did it do to her?
Bubblegum Crisis - Rated: T - English - Adventure - Chapters: 14 - Words: 16,841 - Reviews: 26 - Favs: 11 - Follows: 12 - Updated: 7/23/2014 - Published: 7/13/2011
Halo: The Human Effect by MJOLNIR117 reviews
Following the Human-Covenant War, Humanity finds a buried device that allows trans-galactic travel far faster than Slipspace. It was heralded as the greatest scientific find in Human history; the rest of the galaxy simply calls it the Mass Effect. Now mankind needs to forge a new place for itself among the stars.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 67,131 - Reviews: 441 - Favs: 660 - Follows: 778 - Updated: 3/27/2014 - Published: 7/12/2010
Broken People by Tajjas reviews
The Sky People's technology helps to save Tsu'tey after the battle, but he isn't quite sure what to think of the broken Sky Person in the wheeled chair that keeps coming to visit him while he's recovering. Friendship fic, AU for obvious reasons.
Avatar - Rated: K+ - English - Friendship - Chapters: 37 - Words: 126,966 - Reviews: 739 - Favs: 1,451 - Follows: 1,409 - Updated: 1/7/2014 - Published: 4/29/2010 - Tsu'tey, Jake S.
Semper Vitae by Katkiller-V reviews
Six months removed from the Battle of the Riverbed, things are finally returning to a degree of normalcy for both humanity and the Na'vi, but there are signs that yet more chaos is on the horizon. Predators are once more migrating to the region, and there are rumors of war drifting from the southern clans. Only time, it seems, will tell if yet more battle will mar Pandora...
Avatar - Rated: M - English - Sci-Fi - Chapters: 2 - Words: 5,976 - Reviews: 36 - Favs: 107 - Follows: 122 - Updated: 12/19/2013 - Published: 12/15/2013 - Jake S., Neytiri, Parker S., Max P.
The Space Race by Palladius reviews
The USA and the USSR turned their long-standing animosity to the stars with the launch of Sputnik I in 1957. Two hundred years on, the superpowers and their alien allies find themselves embroiled in the machinations of entities beyond their comprehension. AU first contact.
Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 42 - Words: 125,469 - Reviews: 599 - Favs: 703 - Follows: 759 - Updated: 12/16/2013 - Published: 6/20/2013 - Shepard (F), Garrus V.
Halo: A New Age by xpredatorx reviews
In the 26th century humanity along with the sangheili, san'shyuum formed the Orion Systems Alliance the center of galactic government in the orion arm of the galaxy, soon the OSA will meet the citadel council and discover a billion year old secret.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Suspense - Chapters: 34 - Words: 225,340 - Reviews: 722 - Favs: 798 - Follows: 772 - Updated: 10/7/2013 - Published: 3/24/2012
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: 1070 - Favs: 2,241 - Follows: 2,318 - Updated: 9/15/2013 - Published: 1/1/2013
Welcome to the Future by SC84 reviews
An AU fiction that combines the Mass Effect and Crysis universes. A recently revived Commander Jane Shepard must assemble a new team to face the threat of the Collectors. Along the way, she finds another "dead" soldier: Alcatraz, in his Nanosuit, frozen and forgotten in an ancient Ceph ruin. Ignores Crysis 3. Slightly changes events prior to Mass Effect 1. NOT A SHIPPING FIC.
Crossover - Mass Effect & Crysis - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 12,267 - Reviews: 113 - Favs: 207 - Follows: 309 - Updated: 7/21/2013 - Published: 8/18/2012 - Shepard (F), Alcatraz
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: 346 - Favs: 684 - Follows: 720 - Updated: 1/4/2013 - Published: 4/2/2011
Salvation: A Half Life Mass Effect Crossover Story by Jesse De La Rosa reviews
After Gordon Freeman is allegedly killed by the Combine, Earth enters a new technological Golden Age. Until 179 years later, when galactic civilization is threatened once more. A threat that only Earth's two greatest heroes can stop.
Crossover - Half-Life & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 46 - Words: 243,378 - Reviews: 181 - Favs: 262 - Follows: 178 - Updated: 12/13/2012 - Published: 3/7/2011
Halo Effect: Reunion by Sedsone reviews
Halo and Mass Effect crossover. System Alliance is in war with Turian Hierarchy and Batarian Hegemony while SSV Normandy looks for their lost relatives. re-upload
Crossover - Halo & Mass Effect - Rated: T - English - Chapters: 6 - Words: 27,613 - Reviews: 71 - Favs: 123 - Follows: 163 - Updated: 6/9/2012 - Published: 4/4/2012
Yours Truly 2032 by Dartz-IRL reviews
Megatokyo was Huge. Glass, steel, concrete and tarmac, flickering neon lights and cold blue streetlamps; it was the apotheosis of urbanisation, a technological God among cities. A Bubblegum Crisis SI, in the traditional Form.
Bubblegum Crisis - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 255,530 - Reviews: 77 - Favs: 115 - Follows: 91 - Updated: 5/6/2012 - Published: 5/28/2009
Storm on the Horizon by Failcraft Heroes Society reviews
The Doctor thought he could do no more harm to the universe. It takes a fresh perspective to show him he is dead wrong. Post New!Series 3, Mass Effect post-2 pre-DLC.
Crossover - Doctor Who & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 9 - Words: 30,825 - Reviews: 73 - Favs: 219 - Follows: 314 - Updated: 2/24/2012 - Published: 1/13/2012 - 10th Doctor, Shepard (F)
Ashes by whydoineedapenname911 reviews
What if Noble 6 had survived the fall of Reach? This is a Halo-Mass Effect Crossover. This is my first attempt at a fan fic so please review! I do not own the rights to Halo or Mass Effect, they are the property of Bugie and Bioware respectively.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 6 - Words: 14,034 - Reviews: 49 - Favs: 73 - Follows: 102 - Updated: 10/17/2011 - Published: 11/2/2010 - SPARTAN-B312/Noble Six, Shepard (M)
Kittens in Babylon by Thrythlind reviews
A short year or so after returning home from the Earth-Minbari War, Rally Vincent's deadliest enemy arrives to ask a favor.
Crossover - Babylon 5 & GunSmith Cats - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 55,284 - Reviews: 36 - Favs: 41 - Follows: 39 - Updated: 1/26/2011 - Published: 4/22/2010
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: 164 - Favs: 213 - Follows: 290 - Updated: 12/3/2010 - Published: 3/15/2010
I Was A Teenage Dummy Plug by Foxboy reviews
An otaku awakes and finds himself in one of the worst anime to selfinsert in. Final Chapter 13 up.
Evangelion - Rated: T - English - Chapters: 13 - Words: 50,765 - Reviews: 406 - Favs: 561 - Follows: 512 - Updated: 2/16/2008 - Published: 11/3/2002
New Girl in Town by SSG Michael B. Jackson reviews
When an injured young girl with a fantastic story and powers of her own drops into Clark's life, complications ensue. Will she manage to find a niche for herself in Smallville? Check it out and see!
Smallville - Rated: T - English - Drama/Sci-Fi - Chapters: 7 - Words: 42,153 - Reviews: 22 - Favs: 8 - Follows: 5 - Updated: 4/13/2005 - Published: 3/15/2005