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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: 56 - Favs: 57 - Follows: 76 - Updated: 6h - Published: 3/31
BattleTech: The Mass Effect by IX404 reviews
During the beginning of the Reaper War, Shepard is informed of a Prothean artifact claimed by Cerberus and sent to stop them. Little does he know is that soon, he will find himself and his crew in a world both familiar and alien to their own.
Crossover - Mechwarrior/Battletech & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 55 - Words: 279,360 - Reviews: 393 - Favs: 178 - Follows: 219 - Updated: 6/10 - Published: 12/21/2020 - Garrus V., Shepard, James V., Nyreen K.
Xen Effect by ThePilotArchangel reviews
Xen is the gateway between universes and dimensions. It is the place where time, space, physics, and other known rules that define ones life go out the metaphorical window. What will happen when a Child of Xen, a perfect Supersoldier, a Guardian of Humanity, and a Spectre of a Council of aliens find themselves caught up in a war of survival? Find out in "Xen Effect".
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 67,836 - Reviews: 34 - Favs: 66 - Follows: 86 - Updated: 10h - Published: 4/30 - Master Chief/John-117, Cortana, Shepard, OC
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: 892 - Favs: 396 - Follows: 381 - Updated: 6/14 - Published: 6/21/2013 - Master Chief/John-117, Shepard - Complete
The New Order by Germanspeaker reviews
The Emperor give Thrawn everything what he need to destroy the Rebellion in the near of Lothal, but as he moves from Kuat to Lothal he hits a hyperspace anomaly. What Thrawn will do when he arifes with the sevens fleet the terminus systems? Will he brings the imperial order to this new galaxy?
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 2,031 - Reviews: 6 - Favs: 25 - Follows: 32 - Published: 6/14 - Thrawn
From the Barracks: Rise of Man - Alenko: The Subject by Shinigamiryuksan 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: 2 - Follows: 1 - Published: 6/13 - Kaidan A. - Complete
Saga of the Bridgers-Year 5 by Ganel750 reviews
The Death Star has been destroyed. While the Coalition celebrates, Ezra and Jaral return to Lothal, to spend some time with their family and introduce Luke to the ways of the Jedi. But the Empire is far from broken, as Grand Admiral Tanis and his fleet are already preparing to avenge the death of so many of their comrades.
Crossover - Mass Effect & Star Wars Rebels - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 24 - Words: 124,736 - Reviews: 6 - Favs: 16 - Follows: 13 - Updated: 6/13 - Published: 2/2 - [Ezra B., Sabine W.] Stromtroopers, OC
I'm Nobody by free man writer reviews
He didn't have anything when he was born. Just a name and number. But over time, what he had grew. He, with his friends began to understand that there was more to their existence then just their name and number. They will prove that they were meant to be real. To exist. To become something more than just a Nobody. Co-written and created with Jebest4781. Fem Shepard. Now on Ao3.
Crossover - Kingdom Hearts & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 39 - Words: 704,007 - Reviews: 511 - Favs: 468 - Follows: 492 - Updated: 6/12 - Published: 9/13/2020 - Axel, Roxas, Xion, Shepard
Technophiles and Militarists by thelordofdarkreunion reviews
The Reaper invasion is nigh. Outnumbered and outgunned, the Citadel must turn to two new, dangerous allies for salvation: the Adeptus Mechanicus and Imperium of Man.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 45,303 - Reviews: 117 - Favs: 198 - Follows: 274 - Updated: 6/12 - Published: 4/22 - Imperial Guard, Space Marines, Adeptus Mechanicus, Shepard
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: 3 - Favs: 17 - Follows: 23 - 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: 2311 - Favs: 3,510 - Follows: 4,284 - Updated: 6/11 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
Wasteland Galaxy by Redentor reviews
Matriarch Lantaya is a brave explorer from the Golden Age of Asari space exploration, and she wants to go home. The Lone Wanderer is a messianic cyborg from a world scorched in nuclear fire, and he wants to save the wastelands. Courier Six is a tribal postman who usurped control of an entire city state. He wants to eat people. Among other things. (Also available on Spacebattles)
Crossover - Fallout & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 27 - Words: 215,106 - Reviews: 22 - Favs: 130 - Follows: 176 - Updated: 6/11 - Published: 1/5 - Lone Wanderer, Courier, OC
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: 254 - Follows: 271 - 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: 16 - Follows: 23 - 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: 272 - Favs: 719 - Follows: 1,018 - 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: 63 - Follows: 108 - Updated: 6/9 - Published: 8/5/2021 - The Emperor, Primarch/s, Shepard, OC
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: 5 - Words: 16,955 - Reviews: 49 - Favs: 119 - Follows: 150 - Updated: 6/9 - Published: 5/29 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
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: 27 - Favs: 67 - Follows: 88 - Updated: 6/8 - Published: 3/11 - Lizardmen
The Long, Long Walk by This Is Sarcasm reviews
Crow is stuck, but it's not all bad news; he's been offered shelter on the Normandy, and Spider can't hurt them here. Shepard now has an unkillable paracausal warrior, and his 'not-an-AI', Glint, is a complete cinnamon roll, but it's not all good news; he's half-starved, in culture shock, and has a bad case of trust issues. He might need work, sure, but who on this ship doesn't?
Crossover - Mass Effect & Destiny - Rated: T - English - Sci-Fi/Angst - Chapters: 17 - Words: 54,547 - Reviews: 84 - Favs: 221 - Follows: 314 - Updated: 6/8 - Published: 9/15/2021 - Joker, Shepard, Dr. Chakwas, Crow
Unknown events have unmeasurable answers by Watsi reviews
When someone contacts the Quarians about old machinery, they should think twice before engaging with a strange yet so familiar species, a war, and circumstances that will shock two galaxies now that the rift is open.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Drama - Chapters: 11 - Words: 80,702 - Reviews: 206 - Favs: 268 - Follows: 424 - Updated: 6/7 - Published: 4/21 - [Master Chief/John-117, Tali'Zorah] J. Cutter
Mass Effect: The Gears of War by IX404 reviews
Marcus thought he was done fighting after the death of Queen Myrrah, and the activation of the Imulsion Countermeasure. When he goes to help Baird investigate an abandoned COG facility, he will soon discover that while he ended one fight, another one has just begun.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 22 - Words: 130,174 - Reviews: 162 - Favs: 164 - Follows: 193 - Updated: 6/7 - Published: 3/31 - Marcus F., A. Cole, Garrus V., Shepard
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: 332 - Follows: 332 - 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: 68,538 - Reviews: 14 - Favs: 44 - Follows: 46 - Updated: 6/6 - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
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