X-Com and Mass Effect Crossovers
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Xcom: Human 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. Two storms will collide, destruction will be everywhere, and I can only hope this time it will be enough. COVER ART NEEDED!
Rated: T - English - Adventure/Sci-Fi - Chapters: 4 - Words: 13,266 - Reviews: 57 - Favs: 110 - Follows: 143 - Updated: 1/18 - Published: 11/28/2015
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, SEE ENCLOSED NOTICE FOR DETAILS ABOUT REWRITE!
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 52,292 - Reviews: 317 - Favs: 673 - Follows: 835 - Updated: 12/30/2015 - Published: 5/11/2014 - OC
Of Psychics and Flying Chthulu-ships by Dr1ft3r0I reviews
The Volunteer ended the war. Now he and the best of X-Com are stuck in a world that they don't know, surrounded by aliens that may or may not want to kill them all. Oh, and there's a giant metal cuttlefish in the sky. Starts post X-COM: EU, beginning of ME1. Not CRACK!
Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 20,119 - Reviews: 40 - Favs: 110 - Follows: 210 - Updated: 12/26/2015 - Published: 4/29/2015 - [Shepard (F), Garrus V.]
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...
Rated: T - English - Humor/Sci-Fi - Chapters: 24 - Words: 240,217 - Reviews: 767 - Favs: 1,938 - Follows: 2,298 - Updated: 12/25/2015 - Published: 7/19/2014 - U. Wrex, Daro'Xen, Shepard (F), OC
XCOM: Impact by timedraven117 reviews
The Inusannon, and the Protheans, failed. The Cycle continues. One Inusannon breaks. Another teaches. And the youngest, fights. Humanity will take a central role in leading the charge of the future. The Reaper's days are numbered. Indeed, it is the beginning of the end. A war that will shake the galaxy and will never be seen again.
Rated: T - English - Sci-Fi/Supernatural - Chapters: 3 - Words: 14,036 - Reviews: 20 - Favs: 56 - Follows: 90 - Updated: 12/3/2015 - Published: 11/10/2015
Mass Effect: X-Com Theory: Project Shanxi by timedraven117 reviews
It has been over a century since the Ethereal Invasion and the Equis First Contact War. Humanity has learned to accept their former foes, and their former victims. But the threat has always remained, "The greater foe" promised by the UberEthereal. Now it is the year 2157, near the Shaanxi system the Relay War shall begin with a galactic order that has stood for over 2,000 years.
Rated: T - English - Sci-Fi/Supernatural - Chapters: 11 - Words: 54,285 - Reviews: 55 - Favs: 184 - Follows: 236 - Updated: 11/10/2015 - Published: 5/8/2015 - Admiral Hackett, Councilor Tevos, Primarch Adrien Victus
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.
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 152,262 - Reviews: 379 - Favs: 737 - Follows: 812 - Updated: 11/5/2015 - Published: 9/2/2014
A Confederation, A Citadel, and a Commander by Tabac Iberez reviews
nuXCOM/ME When LTC Shepard is called back to duty after admin leave, he doesn't expect anything serious. Certainly not an assignment to Citadel space, his own independent command, or discovering that the diffrence between geting told something and learning about it are as different as cake and pie. Between inter-species screwups and politicos at home, things are gonna get hairy.
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 9,196 - Reviews: 15 - Favs: 32 - Follows: 59 - Updated: 11/2/2015 - Published: 8/14/2015
Re-activation by skyfire777 reviews
After the war, XCOM was reduced to conspiracy theories and urban myths. They did not exist in any shape or form. But they were far from gone. Now, after 50 years of rebuilding, humanity faces yet another threat. Now, after 50 years of preparations, XCOM stands ready to face that threat. Covert!XCOM. Rating subject to change
Rated: T - English - Sci-Fi/Suspense - Chapters: 5 - Words: 9,696 - Reviews: 19 - Favs: 78 - Follows: 144 - Updated: 10/11/2015 - Published: 4/18/2015
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.
Rated: T - English - Sci-Fi - Chapters: 5 - Words: 138,856 - Reviews: 203 - Favs: 660 - Follows: 904 - Updated: 9/5/2015 - Published: 3/20/2014
Vigil: Codex and Supplemental Information by Peptuck reviews
Supplemental information for the Vigil Mass Effect/XCOM/Eclipse Phase/FEAR/Destiny crossover setting. Arranged by topic. Will be updated as new information becomes available in the main storyline.
Rated: K+ - English - Chapters: 3 - Words: 20,887 - Reviews: 2 - Favs: 29 - Follows: 22 - Published: 7/26/2015
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)
Rated: T - English - Sci-Fi - Chapters: 8 - Words: 76,039 - Reviews: 47 - Favs: 156 - Follows: 229 - Updated: 7/17/2015 - Published: 7/19/2014 - Shepard (F), Liara T'Soni, Miranda L.
Council's notes on Humanity by 5 Coloured Walker reviews
This is the Citadel Codex as it applies to Humans in the [TBD] world, who's current stories include: Busy Stars This however is not the codex of general things however, not is it human's documentation on aliens.
Rated: T - English - Sci-Fi - Chapters: 8 - Words: 8,566 - Reviews: 1 - Favs: 28 - Follows: 27 - Updated: 7/6/2015 - Published: 2/11/2015
I Am Watchful I Am Necessary by TheConstellation reviews
Decades have past since the Ethereals threat was defeated and humanity has emerged united and stronger than ever for the conflict it faced. Now after discovering the Prothean Archives on Mars, humanity is about to end up on a much larger stage than it ever expected to play on when yet another alien threat comes knocking. And again, X-COM stands ready to fight. Vigilo Confido.
Rated: T - English - Sci-Fi - Chapters: 9 - Words: 18,569 - Reviews: 367 - Favs: 763 - Follows: 1,042 - Updated: 2/25/2015 - Published: 9/30/2013 - Admiral Hackett
Aleandrea's Alien Primer - Combined and Condensed Edition by 5 Coloured Walker reviews
Alien's aren't just people with rubber faces and funny hats.
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 2,189 - Reviews: 3 - Favs: 2 - Follows: 4 - Published: 2/18/2015
Cause and Effect by Eotyrannus reviews
The Temple Ship threatened to eradicate either XCOM's finest or the entire human race. Instead, it took itself into a whole new universe, where the races of the galaxy used the incredible Element Zero to cross the stars. No one has any idea what's coming... *Being replaced with a remake*
Rated: T - English - Sci-Fi - Chapters: 7 - Words: 21,235 - Reviews: 64 - Favs: 218 - Follows: 297 - Updated: 9/15/2014 - Published: 5/18/2014
X-COM: Enduring Legacy by Wixeron reviews
Humanity has survived, adapted and won against extraterrestrial threats even before they leave Earth. Now, with a changed mentality, they took to the stars and would bring about a revolution to the galactic community and inadvertently, change the course of the Cycle.
Rated: T - English - Sci-Fi - Chapters: 4 - Words: 21,696 - Reviews: 39 - Favs: 153 - Follows: 209 - Updated: 8/23/2014 - Published: 7/27/2014
The Galaxies Black Ops by Excalibursoul reviews
The XCOM project continues on while Shepard saves the galaxy XCOM will operate without the public knowing about them I know not the best work but I'll flesh it out.
Rated: T - English - Chapters: 4 - Words: 3,969 - Reviews: 4 - Favs: 13 - Follows: 14 - Updated: 7/6/2014 - Published: 5/4/2014
When Civilizations Meet: Tali's School Days by Generatedname reviews
A less serious side story to my fic 'When Civilizations Meet', this fic details Tali and her fellow Psionic Quarian students' adventures in a Terran Alliance elementary school. This fic has little to no effect on the storyline of When Civilization Meet. WARNING: Contains My Little Chryssalid.
Rated: T - English - Humor/Sci-Fi - Chapters: 4 - Words: 5,806 - Reviews: 30 - Favs: 102 - Follows: 113 - Updated: 6/6/2014 - Published: 5/18/2014 - Garrus V., Tali'Zorah, Kal'Reegar, Solana Vakarian
The XCOM Effect by Havocfrost reviews
2183: Humanity has survived second contact, but now Eden Prime burns and the ancient boogeymen of Earth's past are set to destroy the fragile place Humanity has earned. Beset on all sides by indifferent allies and hostile alien races, only one man can bring the galaxy back from the brink and unite the disparate species against the real foe threatening them all.
Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 47,921 - Reviews: 53 - Favs: 112 - Follows: 152 - Updated: 5/25/2014 - Published: 3/26/2014 - Saren A., Shepard (M)
Extradimensional Assistance by President John Henry Eden reviews
Commander Shepard found himself in command of six alien hunters from a neighboring parallel universe. Now, he has the new responsibility of trying to keep the XCOM operatives in his squad from tearing the Normandy crew apart with either rampant xenophobia, or just by plain old poor communication skills. Starts from ME2's Freedom's Progress. Ends in Collector Base? Not necessarily.
Rated: T - English - Sci-Fi/Friendship - Chapters: 4 - Words: 47,038 - Reviews: 45 - Favs: 103 - Follows: 136 - Updated: 3/11/2014 - Published: 2/23/2014 - Garrus V., Tali'Zorah, Shepard (M)
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'
Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 294,105 - Reviews: 1013 - Favs: 1,867 - Follows: 1,939 - Updated: 9/15/2013 - Published: 1/1/2013
Across Time and Space, There's Always Earth by Wanderer D reviews
A new energy signal discovered in the middle of the Reaper invasion might be just what Shepard needs... or perhaps it might doom them all. Despite ending up in unexpected places, Shepard knows what she aims to protect, because, even across Time and Space... there's always Earth.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 4,039 - Reviews: 18 - Favs: 49 - Follows: 92 - Published: 6/13/2013 - Shepard (F), Garrus V., Liara T'Soni, U. Wrex
The Volunteer by Primordial Soul reviews
A hero's duty never ends. A hero's journey never ceases. A hero never dies. If energy cannot be destroyed, then heroes never fall. They only move on. The Volunteer follows this creed. And in this new universe, the Volunteer will do what she does best. For she is XCOM. Always vigilant. Always reliable. Post ME1. Volunteer/Liara. ON-HOLD
Rated: T - English - Chapters: 1 - Words: 3,947 - Reviews: 23 - Favs: 50 - Follows: 90 - Published: 3/30/2013 - Liara T'Soni, Nyreen K.
The war that never ends by Masterblader158 reviews
Mankind survived against all odds and now they must do it again but this time much much harder and bigger. (Will fit in Marauder Shields at an appropriate time in the story) need reviews to help me improve and for suggestions.(On Hiatus)
Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 1,615 - Reviews: 2 - Favs: 17 - Follows: 23 - Updated: 2/1/2013 - Published: 1/25/2013 - Marauder Shields
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