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A Swarm Unleashed by
RoyalStarlord reviews
A man with amnesia had woken up in a desert oasis one day, and in a world he does not recognize. He also doesn't recognize his new form and role as a newly reborn zerg organism. But upon his rebirth, he was given the option to command the zerg swarm. (Temporary break)
Crossover - X-overs & StarCraft - Rated: M - English - Sci-Fi/Fantasy - Chapters: 100 - Words: 622,732 - Reviews: 371 - Favs: 297 - Follows: 313 - Updated: 9/9 - Published: 4/29/2017 - Zerg, OC
Gate: Thus the Sorcerous Kingdom Fought There by
oblivon2991 reviews
A strange Gate appeared in the capital of the Sorcerous Kingdom, and through it, foreign soldiers started to flood. Killing and kidnapping the denizens of the Sorcerous Kingdom's capital. Now our beloved Papa Bones can't let such dirty things. Does he? (Warning! The story contains some of my OC's) (AU!)
Crossover - Gate - Jietai Kare no Chi nite, Kaku Tatakeri & Overlord/オーバーロード - Rated: T - English - Adventure - Chapters: 34 - Words: 572,852 - Reviews: 1236 - Favs: 1,189 - Follows: 1,368 - Updated: 9/5 - Published: 1/28/2017 - Itami, OC, Ainz
Dust, Darkness and Dark Knights by
Twisted Fate MK 2 reviews
In ages past, an Undead knight sought answers in the land of gods. Then, he sought destiny. And then he sought out mercy, for those who he honored. Then he finally sought an eternal rest, and found it as kindling for the First Flame. Or so he thought, as he instead found himself awoken and entombed in ash and stone eons later. And now he must find something else to seek out.
Crossover - Dark Souls & RWBY - Rated: T - English - Adventure - Chapters: 26 - Words: 140,329 - Reviews: 338 - Favs: 771 - Follows: 1,064 - Updated: 8/25 - Published: 10/18/2018 - Deprived, Dr. B. Oobleck
The Embers still Remain by
Wernher von Braun reviews
Countless ages have passed ever since the end of the First Flame. Yet the remains of the Age of Fire still exist, waiting to be reignited. The First Flame shall be relinked and its power restored. Whether it is for good or ill, that is a question that the denizens of the new age have to find by themselves.
Crossover - Dark Souls & Dungeon ni Deai o Motomeru no wa Machigatte Iru Darou ka - Rated: T - English - Supernatural/Adventure - Chapters: 3 - Words: 10,664 - Reviews: 18 - Favs: 94 - Follows: 135 - Updated: 8/23 - Published: 5/19 - OC, Bell C., Hestia
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: 1089 - Favs: 1,195 - Follows: 1,556 - Updated: 8/23 - Published: 3/13/2013
Stage two Zerg Swarm Empress by
NOOBZILLA reviews
Protoss purity of Form. Zerg Purity of Essence. Human Purity of will. Time marches on as members of Ellen's swarm effect the fates of worlds and people across the galaxy long before the events of Starcraft and Halo begin. What does the future hold for Ellen and her swarm?.
Crossover - StarCraft & Halo - Rated: M - English - Sci-Fi/Fantasy - Chapters: 29 - Words: 336,852 - Reviews: 82 - Favs: 53 - Follows: 52 - Updated: 8/19 - Published: 9/2/2018
Catalyst by
Strandshaper reviews
When Abathur, Evolution Master of the Swarm, is cornered by Terran forces, he believes he is about to die. Across the galaxy, a last ditch summoning ritual tries to find something that could fight Voldemort. Neither of these events go as expected. Now Abathur, trapped in the body of a Terran, must rebuild the swarm on his own, and attempt to avoid getting killed in the process.
Crossover - Harry Potter & StarCraft - Rated: T - English - Adventure/Sci-Fi - Chapters: 55 - Words: 147,835 - Reviews: 574 - Favs: 971 - Follows: 1,230 - Updated: 8/13 - Published: 6/3/2017 - Albus D., Luna L., OC, Abathur
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: 21 - Words: 38,709 - Reviews: 77 - Favs: 66 - Follows: 89 - Updated: 8/13 - Published: 3/1/2018 - James R., Terran, OC
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: 4,088 - Follows: 4,907 - 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: 292 - Follows: 347 - Updated: 7/14 - Published: 5/19/2016
Salvation and Ascension by
SpartAl412 reviews
There are powers in the depths of space that no mortal race was meant to know. Secrets best left forgotten for to tamper with such would bring only utter ruin. War now comes to two universes that seek to unlock the secrets of the ancients, their curiosity will set in motion a series of events that will change things forever.
Crossover - StarCraft & Warhammer - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 63,840 - Reviews: 26 - Favs: 45 - Follows: 58 - Updated: 7/6 - Published: 4/10 - Protoss, Zerg, Imperial Guard, Space Marines
Cycles Upon Cycles by
The Incredible Muffin reviews
The residents of the Koprulu Sector thought they had finally achieved peace. They were wrong. Now, the Koprulu Alliance is faced with a galaxy that was bigger than they thought. They will meet new friends, and more importantly, new enemies, but all will be forced to put away their hatreds, both old and new, or none will survive the darkness that is to come...
Crossover - StarCraft & Mass Effect - Rated: T - English - Sci-Fi/Supernatural - Chapters: 37 - Words: 359,067 - Reviews: 1328 - Favs: 2,051 - Follows: 2,335 - Updated: 6/19 - Published: 1/13/2015
The Conquest of Westeros by
Unusual Dispentry reviews
Unwillingly torn from their beloved Empire by a scheming elven goddess, Emperor Karl Franz I and the remnants of his battered Imperial force found themselves stranded on a world yet untouched by the foul grip of Chaos. While the new lands seem peaceful at first, the sons of the Heldenhammer would soon find to their dismay that corruption and strife lurks in Westeros all the same.
Crossover - Warhammer & A song of Ice and Fire - Rated: M - English - Fantasy/Drama - Chapters: 11 - Words: 154,480 - Reviews: 341 - Favs: 842 - Follows: 1,060 - Updated: 5/29 - Published: 3/21/2017 - The Empire, Wood Elves, Dwarfs
The Warhammer Effect: Collateral Misfortunes by
BKGeno reviews
In the future, where there is only war, sometimes desperate measures must be taken to secure the survival of a few. But when that measure leads to a place far different from what they know, can the Eldar adapt to a new reality, where there is more than only war? Also, what is a monkey? Picture by timokujansuu on Deviantart.
Crossover - Warhammer & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 37 - Words: 276,955 - Reviews: 463 - Favs: 547 - Follows: 753 - Updated: 5/10 - Published: 9/9/2017 - Eldar, Shepard (F)
The Winter Witch by
Kneazle reviews
Hermione realized it began with a sense of Impending Doom and finished with a battle outside her tent. The deciding line between staying and helping Robb Stark, or returning to her universe, is getting harder to see the longer she's in Westeros. But it's a decision that she has to make, or it's one that will be made for her. Part 1 & Part 2 complete! Part 3 coming in Oct 2019.
Crossover - Harry Potter & Game of Thrones - Rated: T - English - Adventure/Fantasy - Chapters: 31 - Words: 263,008 - Reviews: 2254 - Favs: 2,949 - Follows: 3,593 - Updated: 5/4 - Published: 10/15/2017 - [Hermione G., Robb S.] Roose B.
From the Ashes by
erttheking reviews
Even after seeing their world burned, Humanity was able to stand up again, and push beyond their pre-war status and reach the heavens. But how will a hardened Humanity handle life among the stars? And how will others react to this aggressive newcomer?
Crossover - Fallout & Mass Effect - Rated: T - English - Sci-Fi/Romance - Chapters: 118 - Words: 913,475 - Reviews: 3479 - Favs: 2,664 - Follows: 2,512 - Updated: 2/24 - Published: 5/17/2012
Biomass Effect 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: 59 - Words: 303,766 - Reviews: 2634 - Favs: 3,568 - Follows: 3,999 - Updated: 12/3/2018 - Published: 8/8/2014
The Arda Campaign by
Lord Exar Kun reviews
When a Separatist anti-gravity well generator prototype goes haywire Jedi knights Obi-Wan Kenobi and Anakin Skywalker will find themselves blasted into a strange world called Arda. Where they will join on a quest to destroy this strange thing called the Ring of Power. However general Grievous a mysterious dark Jedi and a droid army have also landed in the realm of Shadow in Mordor.
Crossover - Star Wars & Lord of the Rings - Rated: T - English - Adventure/Fantasy - Chapters: 45 - Words: 482,230 - Reviews: 457 - Favs: 328 - Follows: 310 - Updated: 11/28/2018 - Published: 9/13/2013 - Anakin Skywalker, Obi-Wan K., General Grievous, Aragorn - Complete
the rise of the Cryo army by
isolono reviews
title is subject to change, a person dies and reincarnated same story but in this case he became two person one zerg and one protoss, with these two combination they will invade the multiverse while destroying common sense and sometimes the 4th wall, chaos ensues (also includes bashing)
Crossover - X-overs & StarCraft - Rated: T - English - Adventure/Sci-Fi - Chapters: 8 - Words: 24,421 - Reviews: 7 - Favs: 21 - Follows: 27 - Updated: 11/15/2018 - Published: 4/18/2018 - Protoss, Zerg, OC, Hybrid
The Final Test by
YuriManuganov reviews
The Q decide to test humanity once more, but as cultures, species and universes collide things are thrown into chaos and it becomes a nightmare for all involved. One can only plant so many seeds before they are overrun by the forest they have wrought. The universes of Star Trek, Star Wars, Cthulhu and several surprises are not meant to collide, even under a Q.
Crossover - StarTrek: The Original Series & Star Wars - Rated: M - English - Sci-Fi/Mystery - Chapters: 47 - Words: 218,901 - Reviews: 10 - Favs: 26 - Follows: 30 - Updated: 10/31/2018 - Published: 1/1/2017 - J. Kirk, Spock - Complete
Multiversal Alliance by
Beastrider9 reviews
A series of one shots of everything crossing over with everything else. All within the same continuity. Where multiversal travel allows fiction to meet fiction.
Crossover - X-overs & TV X-overs - Rated: T - English - Sci-Fi/Fantasy - Chapters: 13 - Words: 113,887 - Reviews: 52 - Favs: 46 - Follows: 49 - Updated: 10/16/2018 - Published: 9/22/2015
Merged Galaxy Part 1: Tenuous Pacts by
Slipspace Anomaly reviews
Nations collide as 2 alternate versions of the Milky Way Galaxy are joined into 1. As members of the SGC and the UNSC struggle to establish peaceful relations, a new threat emerges. One that includes new enemies from each of their pasts. Co-written with Jon Harper.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Chapters: 21 - Words: 164,926 - Reviews: 201 - Favs: 279 - Follows: 378 - Updated: 10/8/2018 - Published: 1/30/2017 - H. Maybourne, OC, Master Chief/John-117, C. Halsey
Heart of Chaos by
Chris000 reviews
In the grim darkness of the far future there is only war. There exists a prison at the center of the galaxy and its occupant seeks freedom. It has almost succeeded. The UNSC. Mobius and their Allies, in an attempt to stall if not kill the Prisoner outright must venture to another universe to seek Chaos Energy. Their searches brought them to a world they are unprepared for.
Crossover - Game X-overs & Warhammer - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 104,644 - Reviews: 7 - Favs: 15 - Follows: 14 - Updated: 8/18/2018 - Published: 2/6/2016
Zerg Swarm Empress by
NOOBZILLA reviews
Protoss purity of form. Zerg purity of Essence. but what if there was a third race with purity of Will. Earth, year 2010, A young girl Awakens to her new power as a Valkyrur, but draw's the eye's of the zerg. how does the iron will and self determination of one girl shape the fate of a galaxy and maybe save it from a ancient evil waiting to be set free.
Crossover - StarCraft & Valkyria Chronicles - Rated: M - English - Sci-Fi/Fantasy - Chapters: 31 - Words: 301,451 - Reviews: 43 - Favs: 79 - Follows: 58 - Updated: 6/24/2018 - Published: 8/3/2017 - Complete
The Fourth Galactic Power by
The Real BONK'er reviews
Another species join the race for expansion after the Shepard's resurrection. How will the other races react on the new stronger rivals? Is the Citadel Council ready for a race of military character? How are the Carvins gonna react for the Council's constant bullshiting? Are they ready to help Commander Shepard and his crew to defeat the Collectors? Where are they from anyway?
Crossover - Mass Effect & Spore - Rated: T - English - Adventure/Friendship - Chapters: 17 - Words: 130,537 - Reviews: 40 - Favs: 78 - Follows: 88 - Updated: 6/3/2018 - Published: 11/24/2016 - Garrus V., Illusive Man, Shepard (M), OC - Complete
The Spartans of Mandalore by
hswatton147922 reviews
They called us the best. Didn't feel like it sometimes. But this, this was a chance. A chance to make the best, to have a true, lasting legacy that will be heard across the whole galaxy. This was my chance to change it all and to truly make the greatest soldiers this galaxy had ever seen. Better than all the rest. Maybe then this new title of mine won't weigh me down so much.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 59 - Words: 289,340 - Reviews: 291 - Favs: 431 - Follows: 489 - Updated: 4/12/2018 - Published: 6/3/2017 - Master Chief/John-117, Cortana
Starcraft: Reigns of War by
TheWatcher2785 reviews
After an incident with a warp gate, a large portion of Protoss was sent beyond time and space only to exchange one enemy for another. Now within a new world, what effect will the Protoss have against Arthas and his legion of undead. R&R please.
Crossover - StarCraft & Warcraft - Rated: T - English - Sci-Fi/Fantasy - Chapters: 38 - Words: 150,121 - Reviews: 477 - Favs: 572 - Follows: 588 - Updated: 3/1/2018 - Published: 2/6/2012
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: 268 - Follows: 350 - Updated: 2/17/2018 - Published: 12/7/2015
Overlord Effect by
oblivon2991 reviews
With the arrival of the Shinigami and his enforcer came hardship. With hardship came equality. With careful planning came advancement. With advancement, the civilization thrived. And when a fantasy based civilization met an another one? What's then? What happens when the Sorcerer Kingdom met the galactic community? The Reapers? (AU with a lot of OC'S! Beware! XD) HIATUS until fn.
Crossover - Mass Effect & Overlord/オーバーロード - Rated: T - English - Sci-Fi/Fantasy - Chapters: 10 - Words: 156,126 - Reviews: 340 - Favs: 669 - Follows: 796 - Updated: 2/17/2018 - Published: 3/21/2017
Viral Saints by
MikeX713 reviews
After surviving a horde of zombies, black ops death squads, and a nuke, Alex Mercer now has a new outlook on life. And decides that the best place to enjoy his new immortal life as walking death is... Stilwater.
Crossover - Saints Row & Prototype - Rated: M - English - Sci-Fi - Chapters: 45 - Words: 242,780 - Reviews: 254 - Favs: 188 - Follows: 202 - Updated: 1/22/2018 - Published: 5/29/2016 - Carlos M., J. Gat, Alex M./Zeus, Dana M.
Zerg Wars Ark by
Yoshiki-909 reviews
The Protoss, Terran, and Zerg have been in peace since the death of Amon. Princess Saraslha of the Swarm adventures throughout the unknown territory outside of the Koprulu Sector and discovers the 'Ark? Will this new war forever be changed? Starcraft 2 x Halo wars 2 ... Contains OC's (Howling Din's OCs) [Currently in rewwrite]
Crossover - StarCraft & Halo - Rated: T - English - Sci-Fi - Chapters: 4 - Words: 6,648 - Reviews: 40 - Favs: 63 - Follows: 73 - Updated: 12/24/2017 - Published: 2/9/2017 - Zerg, OC, J. Cutter
Remnant of the Swarm by
MrOreoMan reviews
Ever since my Queen's ascension to Godhood and her disappearance, I've taken the mantle of leading the Zerg Swarm. Now with the new age of peace and prosperity between all three races of the Koprulu Sector. I grew... bored and wished for something to happen. Unfortunately for me, something did happen. Like the old Terran saying "be careful what you wish for."
Crossover - StarCraft & RWBY - Rated: M - English - Adventure/Sci-Fi - Chapters: 17 - Words: 151,585 - Reviews: 454 - Favs: 670 - Follows: 742 - Updated: 11/23/2017 - Published: 1/28/2016 - Cerebrate, OC
Another World, One Last Chance by
Lady of the North Star reviews
An entire planet system on the 41st millenium has been pulled to another place thanks to the efforts of an Emperor and a rather pissed off Eldar goddess. With stragglers and unwanted guests behind those who are chosen by the deity of the humans, those who had been given a second chance must live on a world different from their own. Warhammer40K X Mass Effect X Starcraft 2
Crossover - Warhammer & Mass Effect - Rated: T - English - Romance/Sci-Fi - Chapters: 43 - Words: 237,303 - Reviews: 1327 - Favs: 557 - Follows: 580 - Updated: 7/13/2017 - Published: 12/3/2016 - Eldar, The Emperor, Harlequins, Shepard (M) - Complete
Terran Federation: Contact by
L4 of the WEST reviews
For more than 20 years, the Terran Federation's path into the darkness beyond Earth has been marked by war, betrayal, and bugs. Every alien they met in the blackness of space has been hostile, pushing the region on a path to another great interstellar war. But sometimes, you get lucky, will the 6th time over Shanxi be it?
Crossover - Starship Troopers & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 28 - Words: 164,615 - Reviews: 355 - Favs: 747 - Follows: 806 - Updated: 4/16/2017 - Published: 8/7/2014 - Complete
The Dark Empire by
Light-in-Oblivion reviews
Harry Potters brother is hailed as the Boy-Who-Lived, leaving Harry forgotten. But when Harry discovers a secret about the first Peverell everything changes. Thrust into a world much larger than he could ever dream about, Harry must rebuild a Empire, avenge an ancestor and understand one truth. Peace is a Lie. *Abandoned as of 20-02-2019*
Crossover - Star Wars & Harry Potter - Rated: M - English - Adventure/Romance - Chapters: 15 - Words: 124,424 - Reviews: 756 - Favs: 3,310 - Follows: 3,794 - Updated: 3/31/2017 - Published: 1/11/2016 - [Harry P., Aayla S.]
Red Alert: Mental Effect by
Mental Omega reviews
Mankind is divided between the Forgotten, the Phantom Syndicate, those who believe Yuri is master, and those who fly the united banner of the Allies and Soviets. The galaxy adjusts to a new paragdim as the science of Tiberium and Element Zero collides. And dolphins can talk. The story of Red Alert now takes to the stars in this daring fusion. And as ever, the Scrin wait.
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 101,597 - Reviews: 22 - Favs: 109 - Follows: 127 - Updated: 2/13/2017 - Published: 11/3/2014 - Yuri, Shepard (F), Shepard (M)
Intention's Eye by
hunter 139 reviews
It's been said that one minor conflict matters little in the grand scheme of things. That it's a footnote in history. Tell that to those worlds that have been ravaged by such brutal fighting. Multicrossover.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 30,573 - Reviews: 3 - Favs: 12 - Follows: 14 - Updated: 2/5/2017 - Published: 12/24/2015 - OC, Zaeed M., Samara
Naruto vs Zombies: Ninja Warfare by
Punkarella reviews
After the events of PVZ 2, The zombies from all the different time periods are sent to the ninja world where brains are plentiful. Thankfully for the ninjas and unfortunately for the undead, a hyperactive knucklehead finds a book on a type of super plants. It's up to Naruto and his friends to fight off the zombies which terrorize the ninja world. DISCONTINUED
Crossover - Naruto & Plants vs. Zombies - Rated: T - English - Adventure/Humor - Chapters: 12 - Words: 72,912 - Reviews: 45 - Favs: 67 - Follows: 63 - Updated: 9/4/2016 - Published: 4/7/2016 - Naruto U., Ino Y., Kakashi H.
Gods and Demons by
hunter 139 reviews
Ancient species from 7 universes converse about a common problem. Epilogue to my first short story, "The Mantle," read that first. Crossover between Halo, Metroid, Mass Effect, Dead Space and more. Rated T
Crossover - Metroid & Halo - Rated: T - English - Spiritual/Sci-Fi - Chapters: 1 - Words: 1,146 - Reviews: 5 - Favs: 7 - Follows: 6 - Published: 12/30/2014 - Complete
universe at war:Mass assault by
Dragonkingofthestars reviews
A human colony goes missing and the Alliance between Novus Humanity and the Masari meet mass effect full force. liberty's taken in intermeshing the two storys.
Crossover - Mass Effect & Universe at War - Rated: M - English - Sci-Fi/Adventure - Chapters: 28 - Words: 113,870 - Reviews: 58 - Favs: 122 - Follows: 110 - Updated: 9/5/2012 - Published: 8/11/2011