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Eezo-Flux Theory by Larry The Mailman reviews
Humanity found out that it was not alone in the galaxy. It had earned its place in the galactic community, and made it its goal to strive for unity and prosperity. But the barrier between galaxies is fickle, and another galaxy's mankind may yet make a significant difference in the galaxy's period of peace. The Council will stare down the wonders and horrors of the Collapse.
Crossover - Mass Effect & Starsector - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 26,836 - Reviews: 37 - Favs: 75 - Follows: 103 - Updated: 18h - Published: 3/11 - Garrus V., Liara T'Soni, Admiral Hackett, C. Pressley
Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s remnants persist, but their defeat is inevitable. However, The Gods have other plans. The Migrant fleet deciding to escape through a dormant Relay into unknown space, meet "Sleep-deprived Titans with negative zero fucks to give." -LTCOL Church. Heavy AU, RVB elements, swearing.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 3 - Words: 28,112 - Reviews: 81 - Favs: 351 - Follows: 499 - Updated: 19h - Published: 12/25/2022 - Arbiter, T. Hood, Han'Gerrel, Rael'Zorah
Stellar Effect by Brandon Storm reviews
The Reapers trap was perfect in its design. Their execution refined over billions of years, their technology refined since the dawn of time itself. Right up until Someone Broke the Trap!
Crossover - Mass Effect & Stellaris - Rated: T - English - Adventure/Sci-Fi - Chapters: 82 - Words: 359,220 - Reviews: 352 - Favs: 427 - Follows: 548 - Updated: 20h - Published: 8/7/2022
Fall of the Citadel by Richard Scepton reviews
A fleet without an ocean, a humanity scarred forever by war. An admiral without a fleet, and a galaxy on the brink of war. It is the link in between, that will decide our fate, and that of the galaxy as a whole. CW: PTSD, depression, hand-to-hand combat and bayonets. Recommend not for children
Crossover - Mass Effect & Kantai Collection - Rated: T - English - Romance/Sci-Fi - Chapters: 25 - Words: 242,894 - Reviews: 106 - Favs: 105 - Follows: 156 - Updated: 4/21 - Published: 10/26/2023 - Shepard, Shigure, OC, Fubuki
The Bureau of Multiverse Affairs by RedFrontWriter
Recruited by the mysterious Lutece twins, a band of heroes are sent on a mission to hunt down the sinister Professor Moriarty as he attempts to become the greatest criminal in the multiverse.
Crossover - Doctor Who & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 31,578 - Favs: 5 - Follows: 8 - Updated: 4/20 - Published: 3/3 - 4th Doctor, Sarah Jane S., Garrus V., Tali'Zorah
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 17 - Words: 66,245 - Reviews: 311 - Favs: 911 - Follows: 1,348 - Updated: 4/20 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Displaced Destiny by TheCandyManCant reviews
Rigel faced extinction every day of his life, fighting an unending tide of enemies to safeguard his people. When the time came for one last sacrifice, he didn't hesitate. But Destiny had other plans for him... I do not own any established properties and receive no monetary compensation for this fanfic.
Crossover - Mass Effect & Destiny - Rated: M - English - Chapters: 37 - Words: 165,982 - Reviews: 114 - Favs: 325 - Follows: 424 - Updated: 4/19 - Published: 11/19/2023
Never Fade Away by Ideas-Guy reviews
Lives are cheap and money is everything. That's how the orphanage made its money - lending out children for human expirementation. L is an old man at the age of fifteen and he knows he doesn't have much time left. All that mattered was getting out, but he soon learns that the world is a lot bigger than Night City. And that the galaxy is a lot bigger than Earth.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Drama - Chapters: 61 - Words: 276,548 - Reviews: 462 - Favs: 1,203 - Follows: 1,337 - Updated: 4/15 - Published: 10/31/2022 - Shepard, V
New Start Plus: in spaaaaace! by omaster43 reviews
Nick Walters and his merry band of misfits are back with a story about helping Shepard and crew fight giant eldritch robot abominations, most likely through Dumb magic and crazy shenanigans This is a continuation of my previous story, so reading that one first is recommended. but I'm not your nanny you wanna be confused that's your choice. Oc-insert, just came from Dragon age
Crossover - Game X-overs & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 11 - Words: 284,424 - Reviews: 122 - Favs: 320 - Follows: 391 - Updated: 4/14 - Published: 6/6/2023 - Garrus V., Tali'Zorah, Shepard
Humanity Perpetuum by Slim Dustpan reviews
My earliest work, now fully updated! (wow). Within is a tale of a collision of the absurd and rather horrifying world of Red alert and the rich world of the Citadel council, a clash of cultures and species with colourful characters and large scale intergalactic war. Filled with all varieties of Battle; Space Battles, Ground battles, Diplomatic Battles, and (possibly) many more!
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 6 - Words: 18,544 - Reviews: 21 - Favs: 65 - Follows: 95 - Updated: 4/12 - Published: 4/17/2018
A Metal Guardian by JawsOnYou67 reviews
The Universal Century, only a few short years ago humanity nearly eradicated itself to the tune of a madman, now it spreads, free of most of its old hatred. Yet the galaxy won't let them rest. Terminal prepares the twin Queens as best it can. (Gundam x Mass Effect)
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 24 - Words: 116,829 - Reviews: 147 - Favs: 381 - Follows: 474 - Updated: 4/12 - Published: 8/18/2020 - Amuro R., Char A., Tali'Zorah, Admiral Hackett
Ark effect Remake by EclipsePheniox reviews
After the attack on the Collector base failed, the Normandy SR-2 found themselves on Ark a planet roaming with primordial beasts. But as their Commander returns, things become more complex as they learn about Ark and the reason they are there and the purpose of the world.
Crossover - Mass Effect & ARK: Survival Evolved - Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 37,595 - Reviews: 15 - Favs: 69 - Follows: 87 - Updated: 4/12 - Published: 1/3/2023 - Liara T'Soni, Miranda L., Shepard
Bellum Terranum by F35B reviews
Humanity has long since recovered from the effects of the Human-Covenant War, beginning to resettle and rebuild. The Quarians, with help from the Council, have also begun to rebuild their fallen civilization, settling pre-approved Council planets finally settling after surviving the Morning Wars. One pirate attack on a Quarian Colony however will alter the course of history...
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 45,160 - Reviews: 214 - Favs: 491 - Follows: 773 - Updated: 4/11 - Published: 7/31/2023
Imperium Effect by World Archivist reviews
As the Great Crusade grinds on, the Emperor has finally found the last of his sons. But unfortunately someone has been pulling the strings and now Chaos Undivided is ready to make it's move. Warhammer AU. M for eventual bloodshed. Also contains elements of Attack on Titan. Part 1 of the Rebellion series. Reviews are welcome.
Crossover - Warhammer & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 13 - Words: 22,461 - Reviews: 131 - Favs: 246 - Follows: 306 - Updated: 4/11 - Published: 11/14/2016 - The Emperor, Primarch/s, Shepard
Final Destination by The Abyssal Writer reviews
Dr. Datenshi had seen it all. He was there when Admiral Perry ended Japan's Isolationism, he was there when Emperor Meiji turned Japan into a World Power, he was there during the Greatest Generation of Demon Slayers. He was there when Humanity looked to the stars, and joined a galactic community. Dr. Datenshi had seen it all… But Fate, it seemed, wasn't done with him yet.
Crossover - Mass Effect & Kimetsu no Yaiba/鬼滅の刃 - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 14,832 - Reviews: 12 - Favs: 54 - Follows: 98 - Updated: 4/10 - Published: 10/6/2023 - Liara T'Soni, Tali'Zorah, Shepard, OC
Cursed by Hookshot25 reviews
Clayton Carmine has only known hate and carnage for so many years. But once he survives the war he hoped to die in, things get strange. When people need help he isn’t one to shy away, and while helping Baird he gets sent to a place in dire need of a man like him. A man that can’t be claimed by death as easily as his kin.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 11 - Words: 182,586 - Reviews: 26 - Favs: 97 - Follows: 127 - Updated: 4/10 - Published: 4/10/2023 - C. Carmine, Samantha B./Sam, Shepard, Tali'Zorah
Mass Effect 10 Ben Second Chance by benguin reviews
Here is a world for both Ben 10 and mass effects Fans, but basically it like any story where ben world is gone and lives in another universe to move on from the pain. I do not Own Ben 10 and Mass effect. They are owned by they respected properties of Man of Action and Bioware. Please support the official release.
Crossover - Ben 10 & Mass Effect - Rated: T - English - Sci-Fi/Romance - Chapters: 14 - Words: 41,121 - Reviews: 27 - Favs: 44 - Follows: 50 - Updated: 4/8 - Published: 2/15 - [Ben T., Miranda L.] Ship, Shepard
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 21 - Words: 73,190 - Reviews: 151 - Favs: 535 - Follows: 804 - Updated: 4/8 - Published: 7/8/2022 - Rookie, Shepard
The Second Contact war by Mythicspider629 reviews
After the battle for the citadel and jane Shepard's death the galaxy has finally begun to calm down and besides a handful of people everyone has forgotten about the Reapers or chooses to ignore them this makes things easy for the citadel council and with the majority of the Normandy crew scattered throw out the galaxy there is no one left to stop the Batarians from being stupid
Crossover - Call of Duty & Mass Effect - Rated: T - English - Chapters: 5 - Words: 12,647 - Reviews: 10 - Favs: 37 - Follows: 47 - Updated: 4/8 - Published: 3/28 - N. Reyes, E3N/Ethan, Garrus V., Councilor Sparatus
Naruto Style Mass Effect Pt 2 by TheBaneOfOlympus91 reviews
The Reapers have officially arrived in the galaxy, and it's up to Naruto and the crew of the Normandy to put an end to them once and for all. As with the story before, the squad will contain both Naruto and Mass Effect characters, and I will cover the From the Ashes, Leviathan, and Citadel DLC, and most likely Omega.
Crossover - Naruto & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 14 - Words: 105,161 - Reviews: 25 - Favs: 146 - Follows: 176 - Updated: 4/6 - Published: 7/30/2013 - Shikamaru N., Naruto U., Garrus V., Liara T'Soni
Book One: Harvest by Believer218 reviews
The year is 2583. Humanity stands strong, even twenty-six years after a disastrous first contact. They are on a path to getting a human into the Citadel Council's Special Tactics and Reconnaissance. But that human is soon to discover that the Citadel isn't the only conglomerate of aliens. Rated M for graphic depictions of violence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 7,213 - Reviews: 19 - Favs: 35 - Follows: 67 - Updated: 4/5 - Published: 4/4 - [Master Chief/John-117, Ashley W.] Arbiter, Admiral Hackett
Force Effect: A Knights of the Old Republic & Mass Effect Crossover by DayDream Jedi reviews
Published for the 10th/20th Anniversary of KOTOR, this tale mixes two of Bioware's biggest hits and the results could be... explosive. Shepard and her crew thought that The Crucible would save them and destroy the Reapers. They were wrong. New rules. New enemies. New war.
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 9 - Words: 26,709 - Reviews: 13 - Favs: 48 - Follows: 78 - Updated: 4/5 - Published: 7/15/2013 - [Revan, Shepard] Bastila S., Tali'Zorah
Mortal Desperations by Solthrin reviews
Arcturus Magnus, Sagittarum of the Legio Custodes, has fought for years within the webway and the Impossible City. Upon taking a near-fatal wound, the Emperor Himself removes Arcturus from the front, sending him instead to bring forth reinforcements from the Mechanicum. When something goes wrong during the return, where does this Custodian find himself?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 69,513 - Reviews: 122 - Favs: 586 - Follows: 836 - Updated: 4/5 - Published: 1/17/2023 - Adeptus Mechanicus, Tali'Zorah, Shepard
The Dream Effect by DarkPhoenixLady reviews
A rewrite of the original dream effect. Set hundreds of years after the Deep Dream series. Humanity has been slowly expanding across space, and has just encountered the citadel races. After a rocky start, the two groups start to co-exist. Then someone attacks Eden Prime and tries to remove the prothean beacon.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 25 - Words: 117,515 - Reviews: 11 - Favs: 68 - Follows: 94 - Updated: 4/5 - Published: 5/9/2023 - Liara T'Soni, Tali'Zorah, Shepard
Operation ECLIPSE - Apocrypha and Sidestories by HelenTheMoon reviews
Omakes, sidestories and Apocrypha written by me and others for Operation ECLIPSE. The Sidestories are canon, the rest just for fun. Feel free to submit content yourselves! (I'll credit you, obviously)
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Chapters: 8 - Words: 13,297 - Reviews: 7 - Favs: 15 - Follows: 12 - Updated: 4/5 - Published: 12/25/2023
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