X-Com Crossovers
Filters
230 | « Prev Page 1 2 3 4 5 .. Last Next »

Stardust by Tio Brony reviews
Traducción de la historia Stardust de Arad de la página de Fimfiction.
Crossover - X-Com & My Little Pony - Rated: M - Spanish - Sci-Fi/Fantasy - Chapters: 11 - Words: 63,109 - Reviews: 2 - Favs: 1 - Follows: 1 - Updated: 10/18/2020 - Published: 8/20/2019
Avatar of Liberty by NamThunder reviews
The Elder's last hope, the Exodus, was launched during XCOM's final assault on the underwater fortress. The last Ethereal and Avatar, designated as Noah, had to led the crew of the Exodus to find new allies. But they did not expect who and what they will meet in this Kropulu Sector.
Crossover - StarCraft & X-Com - Rated: T - English - Sci-Fi/Adventure - Chapters: 23 - Words: 43,291 - Reviews: 85 - Favs: 105 - Follows: 127 - Updated: 9/29/2020 - Published: 3/1/2018 - James R., Terran, OC
Gargoyles: UFO Defense by Stupid the Ork
What happens when a part of Maggie's past comes searching for her? A part whose job is to wage war against superior alien invaders and their monsters? X-COM side combined with Xenonauts.
Crossover - Gargoyles & X-Com - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,021 - Favs: 2 - Follows: 6 - Published: 9/23/2020 - [Maggie R., OC] Talon
XCOM:Land of Fantasy by UNSC Know Your Place reviews
The Alien Invasion is over, the world began to rebuild what was lost, peace is restored. Yet wary of the stars, the people of the world will know that their planet held secrets of its own than the stars above. XCOM will once again, dive to the unknown.
Crossover - X-Com & Touhou Project - Rated: T - English - Chapters: 3 - Words: 25,984 - Reviews: 26 - Favs: 42 - Follows: 47 - Updated: 9/19/2020 - Published: 4/16/2020
ИксЗВКом: Зеркальное отражение by testpilot24 reviews
Перевод XSGCOM: Mirror Image. Ссылка на оригинал: fanfiction .net /s/3631062/1/XSGCOM Mirror Image.
Crossover - Stargate: SG-1 & X-Com - Rated: T - Russian - Adventure - Chapters: 9 - Words: 41,383 - Reviews: 3 - Favs: 5 - Follows: 5 - Updated: 8/31/2020 - Published: 9/1/2011 - Complete
XCOM: Enemy Without by Redrover117 reviews
The year 2015 was when everything changed, when machines descended from the sky and rained death down on the Earth. They thought that we would be easy to conquer, to destroy, they were wrong. The XCOM Project has been officially activated. Good luck Commander.
Crossover - X-Com & Battlestar Galactica: 2003 - Rated: M - English - Chapters: 14 - Words: 27,571 - Reviews: 39 - Favs: 70 - Follows: 83 - Updated: 8/6/2020 - Published: 4/15/2020 - Complete
A Dream of Terrors by Spearka reviews
Crossover between Game of Thrones and XCOM. As the Dead march south, a new and mysterious force from another world is poised to change Westeros forever.
Crossover - X-Com & Game of Thrones - Rated: M - English - Sci-Fi/Fantasy - Chapters: 5 - Words: 48,980 - Reviews: 16 - Favs: 51 - Follows: 73 - Updated: 7/23/2020 - Published: 6/16/2019
The War of Exaltation War of the Worlds XCOM by Praetus reviews
The world is undergoing unprecedented change. It is a time of progress, prosperity and blinding achievement, coupled with dire poverty and a world under pressure from internal struggles. So, no wonder everyone thought the chances of something coming from Mars were a million to one
Crossover - X-Com & War of the Worlds - Rated: T - English - Adventure/Drama - Chapters: 53 - Words: 200,339 - Reviews: 49 - Favs: 34 - Follows: 33 - Updated: 6/19/2020 - Published: 6/1/2019 - Bradford, Dr. Vahlen, R. Shen
XCOM: Enemy Crossfire by cxy31337 reviews
AU. What has three fronts, one overt, one covert and one within? A war against alien invasions. When 5 university students stumble upon a gun fight, and contaminated with alien nanites, they soon find themselves under the auspice of an agency tasked to defend the world from alien threats. With escalating conflict abound, their newfound powers are the only key to winning the war.
Crossover - Animorphs & X-Com - Rated: T - English - Adventure/Drama - Chapters: 2 - Words: 6,400 - Reviews: 1 - Favs: 4 - Follows: 7 - Updated: 6/6/2020 - Published: 4/14/2020 - Cassie, Jake, Marco, Rachel
Our Last Hope by Johnnieboy11 reviews
The Human-Ethereal War, colloquially known as the Long War by those who were on the front lines, has ended with the death of the enemy's leaders aboard their own Temple Ship. For XCOM, a new mission comes:to find the lost Strike-1, their Elite Troops and return them home. For Strike-1, a new objective arises in the fields and cities of a new world, to win a new Long War.
Crossover - X-Com & RWBY - Rated: T - English - Romance/Sci-Fi - Chapters: 4 - Words: 13,408 - Reviews: 5 - Favs: 29 - Follows: 39 - Updated: 6/1/2020 - Published: 10/1/2019 - OC, Van Doorn, Team RWBY, Team JNPR
It's Always Sunny In The Quarantine Zone by DamnedBeret reviews
Against the full might of the horny Manono forces, the alluring wills of aroused old gods, and cheap Lovecraftian shout-outs lay a jaded, battle-hardened, and stretched thin XCOM and the Resistance. Join a beleaguered fireteam and the hypocritical team leader as they try to survive the Northern Quarantine Zone with their balls, freedom and sanity intact.
Crossover - Monster Girl Encyclopedia & X-Com - Rated: M - English - Fantasy - Chapters: 3 - Words: 26,746 - Reviews: 16 - Favs: 32 - Follows: 54 - Updated: 5/29/2020 - Published: 5/6/2020 - Bradford, OC, Van Doorn, Druella
Unknown Contact by ecarden reviews
The obligatory Mass Effect-XCOM crossover, just set a little earlier than most. The Migrant Fleet is looking for new worlds, new tech, new allies. Humanity would very much like to not be exterminated by aliens from beyond the stars. SYNERGY!
Crossover - X-Com & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 18 - Words: 126,651 - Reviews: 136 - Favs: 416 - Follows: 575 - Updated: 4/23/2020 - Published: 6/15/2017 - U. Wrex, Tali'Zorah, Joker, Shepard
A dire mistake by possibly Gigan reviews
ADVENT has been gone for ten years. In that time, the commander had gotten married, had three kids, and got things as close to what they were before the invasion as possible. But what happens when a new foe appears and tries to destroy it all? Thus, XCOM fought.
Crossover - X-Com & Gate - Jietai Kare no Chi nite, Kaku Tatakeri - Rated: M - English - Chapters: 4 - Words: 6,908 - Reviews: 11 - Favs: 58 - Follows: 67 - Updated: 4/9/2020 - Published: 4/1/2019
XCOM: Free as Bird by MercBoss
A simple recon mission for XCOM operative Faith Connors
Crossover - X-Com & Mirror's Edge - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 927 - Follows: 1 - Updated: 4/9/2020 - Published: 2/24/2020 - Bradford, Firebrand, Faith C., Kate C.
Operation: Go Home by The Sauce Boss reviews
You tell someone from 2015 that aliens will rule the world by 2016, they'll call you a liar. You tell someone from 2020 that XCOM will rise up to fight said aliens, they'll call you a liar. You tell XCOM that a bunch of teenagers are gonna be their only hope of survival, they'll most likely shoot you after calling you a liar.
Crossover - X-Com & RWBY - Rated: M - English - Suspense/Supernatural - Chapters: 37 - Words: 212,076 - Reviews: 15 - Favs: 82 - Follows: 90 - Updated: 3/28/2020 - Published: 12/20/2018 - Jaune A., Pyrrha N., L. Ren, Nora V.
Ruby Rose, Engineer Extraordinaire - Paused by Kaiimei reviews
Tumbling through a mysterious portal was not Ruby's plan, nor was it to end up in the middle of a war between humans and aliens on a different planet. With her aura gone and Crescent Rose left at home, Ruby is swept up by Chief Engineer Shen immediately for her love of engineering and weaponsmithing, and together, there's nothing they can't build. - Faunus Ruby.
Crossover - X-Com & RWBY - Rated: T - English - Humor/Sci-Fi - Chapters: 4 - Words: 23,596 - Reviews: 17 - Favs: 149 - Follows: 212 - Updated: 3/13/2020 - Published: 7/23/2019 - R. Shen, Ruby R.
The Dominion rises by tombstone199998 reviews
The dominion has stood strong for centuries since the Ethereal war, under the guidance of the Emperor the Terrans have risen beyond the wildest of dreams, what happens when they encounter the a race of council exiles in desperate need.
Crossover - X-Com & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 5 - Words: 25,421 - Reviews: 76 - Favs: 432 - Follows: 631 - Updated: 3/11/2020 - Published: 6/18/2017
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: 48 - Words: 488,809 - Reviews: 1165 - Favs: 1,225 - Follows: 1,338 - Updated: 2/20/2020 - Published: 7/22/2016 - Team RWBY, Team JNPR - Complete
Code Geass: Lelouch of the XCOM by Flameal15k reviews
A secre from his mother’s past leads Lelouch into a battle against not only Britannia, but a threat from beyond Earth. Can Zero defeat both foes?
Crossover - Code Geass & X-Com - Rated: T - English - Sci-Fi - Chapters: 7 - Words: 16,725 - Reviews: 4 - Favs: 40 - Follows: 44 - Updated: 2/7/2020 - Published: 6/2/2019
Remnant Unknown: Alternate Theory by Spider Wizard reviews
This started out as a gag about various short scenarios that kinda escalated into a story thanks to an idea that one of us on the Discord server had. (Under Rewrite)
Crossover - X-Com & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 2,352 - Reviews: 4 - Favs: 1 - Follows: 7 - Updated: 2/3/2020 - Published: 11/30/2018 - Complete
Earth Is About To Change by erttheking reviews
The Lone Wanderer had protected the Capital Wasteland from as much as he could. But even he has his work cut out for him when it comes to a force from another world. Fortunately, he finds a new ally in this trying time. Patreon sponsored one-shot
Crossover - X-Com & Fallout - Rated: T - English - Drama - Chapters: 1 - Words: 8,207 - Reviews: 3 - Favs: 23 - Follows: 29 - Published: 1/8/2020
Officially that guy by gargomon reviews
A very salty guy gets sent into the Dreamworks' She-ra verse and has the body of an X-com avatar with all the psychic shennanigans that it entails. Also will have lemons eventually. Do not read unless you want to have a headache.
Crossover - X-Com & She-Ra and the Princesses of Power - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 5,391 - Reviews: 5 - Favs: 11 - Follows: 18 - Published: 12/27/2019
XCOM: Operation Pathfinder by K Fire0210 reviews
Dr Tygan has, on the orders of the Commander, been studying an orb of some kind that appeared out of nowhere in the North American region. This orb happens to be a gateway to another dimension and some of its inhabitants have been dumped into the year 2035 on a world run by aliens. These adventurers are not prepared for XCOM's method of war or its attitude to non-humans.
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,151 - Reviews: 8 - Favs: 35 - Follows: 60 - Updated: 12/6/2019 - Published: 11/23/2019
RU-BY Chibi by Stark Savior-the mad engineer reviews
Vahlen's gotten her hands on a machine that selectively alters reality to a relative normal. How bad is Bradford going to freak out, and how much havoc will XCOM's soldiers wreck on the Avenger?
Crossover - X-Com & RWBY - Rated: T - English - Humor/Parody - Chapters: 1 - Words: 1,134 - Reviews: 1 - Favs: 2 - Follows: 3 - Published: 11/22/2019 - OC, Team RWBY, Team JNPR
X-COM Ad Infinitum by Xphonias reviews
X-Com, Mass Effect Crossover, Space Engineers elements. As Humanity pushes off the Ethereal threat a cycle continues, while a vast, unknown Galactic Civilization lives right upon its borders, bringing with it possible friends, or foes.
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 6,725 - Reviews: 14 - Favs: 97 - Follows: 145 - Updated: 10/25/2019 - Published: 3/25/2018
230 | « Prev Page 1 2 3 4 5 .. Last Next »