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The Ruby of Cerberus by Scrambleman17 reviews
1 week before classes start again, team RWBY watched a report relaying to a strange light at Vale's industrial district, what they didn't know is that it would lead them to another dimension quite different from their own, and unwillingly trap themselves in this strange dimension. contains liberties with canon from both franchises and inevitable OCs.
Crossover - Mass Effect & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 17 - Words: 77,784 - Reviews: 31 - Favs: 65 - Follows: 94 - Updated: 6/21 - Published: 9/7/2021 - Miranda L., OC, Team RWBY
A Whole New World by Spartan III Commando reviews
Noble six's story did not end on Reach, he escaped the doomed planet after saving the Pillar of Autumn, and he and 117 fought across each Halo, until an incident sent him to a whole new world. And he is wholly unprepared for the journey in store.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 7 - Words: 27,736 - Reviews: 43 - Favs: 232 - Follows: 344 - Updated: 6/21 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
From the Barracks: Rise of Man - Montoya : The Prey by CrepeSquid
An research station on a jungle planet has gone dark. The squad known as the Dutch Girls has been sent to investigate. A Joint project with M. B. Liddle, Author of Aggressor: Rise of Man
Crossover - Mass Effect & Resistance: Fall of Man - Rated: M - English - Horror/Sci-Fi - Chapters: 1 - Words: 5,689 - Favs: 1 - Published: 6/20
STAR WARS: The Dragon Effect Saga EPISODE ONE The Hidden Menace by jacques0 reviews
An odd little fusion between my favorite Bioware series thrown into a Star wars setting. So enjoy the read.
Crossover - Mass Effect & Dragon Age - Rated: T - English - Fantasy/Adventure - Chapters: 19 - Words: 50,989 - Reviews: 23 - Favs: 16 - Follows: 17 - Updated: 6/20 - Published: 6/7/2021
Fire for Stellar Effect by vmoneywashere reviews
Somewhere along the lines of history, two Humanities would evolve in two galaxies. One of these Earths would unite an entire galaxy under its flag and defeat the unbidden. With no threats left in its home space, the United Nations of Solar Species decides that the Reapers make good target practice and invades to stop them. Extreme OP Humanity, AU, and curb-stomping Reapers.
Crossover - Mass Effect & Stellaris - Rated: T - English - Humor/Sci-Fi - Chapters: 10 - Words: 50,735 - Reviews: 52 - Favs: 273 - Follows: 333 - Updated: 6/19 - Published: 10/4/2021 - Tali'Zorah, Shepard, OC
Galactic Upheaval by palik reviews
Our closest planet was always a mistery to us. So close yet so enigmatic, for a reason. The Exploration of mars has brought many changes in Human sociaty, none more then the discovery of an Alien Beacon filled to the brim with technology and designs never thought possible. A scared Humanity ventures into the stars to carve out is own place in the galaxy. (Slight HFY, maybe not)
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 12 - Words: 22,482 - Reviews: 118 - Favs: 393 - Follows: 516 - Updated: 6/19 - Published: 7/2/2021
United Earths Empire: The Beginning of a New Age by Destarien reviews
What if three Universes once separate come together. three different humanities with three different paths of technology merge into one galaxy. Citadel space will never be the same because the Schahl Empire and UNSC are here. Two Civilizations, one at war and one ready for war.
Crossover - Halo & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 6 - Words: 21,260 - Reviews: 60 - Favs: 175 - Follows: 225 - Updated: 6/19 - Published: 5/29 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
Kyubi Effect by Ninja65 reviews
Naruto has lived an interesting life. This is the story of his life after his original one. Full of adventures and technology Naruto couldn't have even fathomed. Will he find himself in this new life he has to start. Will he find love even ... Heck yea he will. Naruto x Harem SlightAU Naruto
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 33,395 - Reviews: 40 - Favs: 184 - Follows: 247 - Updated: 6/17 - Published: 10/3/2021 - Naruto U., Hinata H., Liara T'Soni, Tali'Zorah
The First Interplanetary War by the stargate time traveller reviews
Prospectors, pirates, failures and successes...A history of space travel in a combined Expanse and Mass Effect universe.
Crossover - Mass Effect & Expanse - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,369 - Reviews: 8 - Favs: 36 - Follows: 35 - Published: 6/17 - Complete
Destiny Lost by Twisted Fate MK 2 reviews
The Gods left remnant together, with the statement they would never return to it or influence it. Only, that wasn't true, was it? The God of light, ever the hypocrite and liar, didn't abandon Remnant. Instead, he reincarnated someone to do his bidding and bring Remnant to them. Cue, the now dead Pyrrha Nikos and the God of Darkness' ideas. / Supporter Requested by Espacole
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure - Chapters: 43 - Words: 188,074 - Reviews: 517 - Favs: 613 - Follows: 851 - Updated: 6/17 - Published: 5/5/2019 - Legion, Pyrrha N., God of Darkness
The Boundary Effect - The Path of a Magician by xyzdreadnought reviews
Isika Valao is a young Asari child, with nothing to her name and a lot to prove. Enamoured by magic and the Alliance, she sets out to become what should Be impossible for the naturally biotic Asari, a magician. With the help of a certain ordinary Magician, she just might make that dream a reality. (A spin off Story to the Boundary Effect, written with Permission)
Crossover - Mass Effect & Touhou Project - Rated: T - English - Sci-Fi/Fantasy - Chapters: 12 - Words: 40,042 - Reviews: 49 - Favs: 188 - Follows: 257 - Updated: 6/17 - Published: 12/17/2018 - OC, Alice M., Marisa K.
Hero or Weapon? by The Plazmaster reviews
Colonel Benjamin Tennyson wasn't you're average Colonel. He had repelled the raiding party on Mindoir as a teen, saved Elysium, and tore through Torfan. He climbed the ranks of the Marines, all alongside his best friend Commander Rachael Shepard. Now he is to face the might of the Reaper army before the Cycle commences. Good thing he has a watch to tell him what time it is.
Crossover - Ben 10 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 3,392 - Reviews: 1 - Favs: 13 - Follows: 18 - Published: 6/16 - [Ben T., Liara T'Soni] [Shepard, Gwen T.]
Aggressor: Rise of Man by M.B.Liddle reviews
Mankind endures. Twice have alien invaders attempted to force humanity into extinction. Twice they have failed. Now, an uneasy peace covers the galaxy as enemies both ancient and new slumber, or pace beyond the walls. The balance is about to tip. A discovery has been made on a Human colony, faces familiar yet strange move against them, and in the middle of it all, a name. Shepard.
Crossover - Mass Effect & Resistance: Fall of Man - Rated: T - English - Sci-Fi/Horror - Chapters: 11 - Words: 66,697 - Reviews: 59 - Favs: 60 - Follows: 84 - Updated: 6/16 - Published: 3/31
Mass Effect: Resurrection by RabidRabbids reviews
Shepard's life hadn't gotten any easier. Entire colonies were disappearing, millions of people gone. And that's not even mentioning she'd been dead for two years, but desperate times call for desperate measures, and Shepard is forced to work with Cerberus to find out what's behind the disappearances. Thankfully, she's got monsters backing her up. (Sequel to Monstrum Immortalem)
Crossover - Mass Effect & Guardians of the Galaxy - Rated: M - English - Sci-Fi/Adventure - Chapters: 16 - Words: 70,198 - Reviews: 4 - Favs: 13 - Follows: 17 - Updated: 6/15 - Published: 6/15/2021
Heroes UNITE! by So-Pro Warrior reviews
Commander Shepard and his team have gathered together the races of their Galaxy in an effort to defeat the Reapers. But is it enough? When the team comes across a strange woman they find out that if they are to truly defeat the Reapers once and for all. They will need all the help they can get. But not from their Universe. Multiverse Crossover! Chapters 6-22 Being Rewritten!
Crossover - Mass Effect & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 49 - Words: 1,514,387 - Reviews: 893 - Favs: 405 - Follows: 390 - Updated: 6/14 - Published: 6/21/2013 - Master Chief/John-117, Shepard - Complete
From the Barracks: Rise of Man - Alenko: The Subject by CrepeSquid reviews
A quiet day on the farm is interrupted by an Asari assault, Will our intrepid hero survive unscathed? Part of a joint project with kind permission from M. B. Liddle, Author of Aggressor: Rise of Man
Crossover - Mass Effect & Resistance: Fall of Man - Rated: M - English - Horror/Sci-Fi - Chapters: 1 - Words: 5,380 - Reviews: 1 - Favs: 3 - Follows: 2 - Published: 6/13 - Kaidan A. - Complete
Mass Infestation by K2JC reviews
Of all the threats the Systems Alliance had faced, a Xenomorph Infestation was by far the worst. The infestation can range from a small colony to an entire planet. The year 2182 saw the largest number of Xenomorph infestations across Alliance Space and the Systems Alliance attempts in exterminating this threat before they were forced to take desperate measures.
Crossover - Mass Effect & Aliens/Predator - Rated: M - English - Adventure - Chapters: 1 - Words: 7,893 - Reviews: 4 - Favs: 23 - Follows: 29 - Published: 6/12
Enduring the Flames of War by Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 45 - Words: 644,608 - Reviews: 2329 - Favs: 3,545 - Follows: 4,327 - Updated: 6/11 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
Sudden Terminus by A Very Thirsty Megalomaniac reviews
The end is nigh. Sequel to Sudden Contact and Sudden Supremacy. Finale of the Sudden Series. The outcome is uncertain.
Crossover - StarCraft & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 22 - Words: 122,131 - Reviews: 132 - Favs: 255 - Follows: 275 - Updated: 6/10 - Published: 10/22/2017 - Zeratul, Saren A., Javik, Tarquin Victus
The Great Galactic War by hellothere45 reviews
Occurs after the events of Halo Infinite. Cortina finds out about a new enemy from the void of space called the reapers who are trying to rule the galaxy sending a warning to her former allies and enemies to unite the, she assigns chief espranza and the Weapon on a mission to unite the Citadel species to fight a war to end all wars in the Galaxy, can they do this task
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,068 - Reviews: 15 - Favs: 19 - Follows: 28 - Updated: 6/9 - Published: 6/3
Place of Our Legacy by firstprime1230 reviews
Earth has been overrun by the forces of the Ori. Beaten, demoralized and on the run in the Ancient city of Atlantis the survivors of Earth make a desperate gamble to save what little they have left. Arriving in a galaxy so different from their own, can they to uphold the legacy left to them by the races that came before? And save a galaxy doomed to a suffer a fate worse than death.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 84,240 - Reviews: 276 - Favs: 753 - Follows: 1,068 - Updated: 6/9 - Published: 4/30/2020
The Good Shepard by Geishadoll reviews
Jesse Shepard was a lot of things: A solider with a shady past, a son, and a brother With the threat of the Saren and the Reapers hanging over his head, he discovers a secret that will shake not only the foundations of the Alliance but the galactic community as a whole. Meanwhile on the Citadel, stalks the lower wards leaving Caroline Shepard and her new very strange partner to fi
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Family - Chapters: 8 - Words: 16,565 - Reviews: 37 - Favs: 67 - Follows: 113 - Updated: 6/9 - Published: 8/5/2021 - The Emperor, Primarch/s, Shepard, OC
Primal Beings, New Horizons by Trico216 reviews
Lustria is destroyed, the lizardmen departed for the stars. Finding an ancient gateway, what will the children of the Old Ones find on the other side?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 4 - Words: 8,311 - Reviews: 28 - Favs: 70 - Follows: 98 - Updated: 6/8 - Published: 3/11 - Lizardmen
RWBY Effect: The Twilight Dawn by Owriush reviews
With the breach dealt with. Team RWBY have earned a break, only before that. They're sent out to investigate a Grimm gathering. Only to end up in a different world all together. One with its own humans, co-existing with aliens. Now Elizabeth Shepard, her crew and the girls of team RWBY must fight to save this new Twilight Dawn, from the growing darkness. (Complete as of 6/7/2022)
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure/Romance - Chapters: 45 - Words: 734,419 - Reviews: 130 - Favs: 336 - Follows: 335 - Updated: 6/7 - Published: 9/16/2015
The Prelude of War by Indigard reviews
A very different Mass Effect galaxy encounters a strange and relentless invader that is on constant hunger for Biomass but they never know it's just a glimpse of what coming for them. Featuring: alternative history for every species, a bigger and more populated galaxy, cunning Asari, militarized and germanized human empire.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 4 - Words: 68,430 - Reviews: 15 - Favs: 46 - Follows: 49 - Updated: 6/6 - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
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