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Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 25 - Words: 656,164 - Reviews: 744 - Favs: 1,447 - Follows: 1,829 - Updated: 2/17 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
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: 13 - Words: 52,234 - Reviews: 4 - Favs: 14 - Follows: 15 - Updated: 2/17 - Published: 6/15/2021
A Change in the Game by ShadowofHawk55 reviews
John Shepard has saved the galaxy on three occasions and finally reached a stable point in his life. Now he and his crew are stranded in a strange, and very dangerous, world. How will this change the Song of Ice and Fire?
Crossover - Mass Effect & Game of Thrones - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 42,374 - Reviews: 78 - Favs: 105 - Follows: 162 - Updated: 2/17 - Published: 1/28/2021
Spectre by Jonathan Palmer reviews
When the SSV Normandy is attacked Ashley convinces Shephard to to go with her. Follow their travels as Shephard makes it off the Normandy alive. Stranded on late 20th century Earth what will they do now? AU, Smart Harry, Female Shephard.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Friendship - Chapters: 5 - Words: 17,206 - Reviews: 22 - Favs: 85 - Follows: 148 - Updated: 2/16 - Published: 1/20 - Harry P., Ashley W., Shepard
The Rise of the Enclave by 6-4 pilot reviews
Stuck in a more peaceful galaxy, the Tau of the Farsight Enclave must still prepare themselves for war against the forces that conspire to destroy it. But as they fight for their existence, elements from their old home come to strengthen their power in said old home.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 14 - Words: 82,014 - Reviews: 77 - Favs: 245 - Follows: 287 - Updated: 2/15 - Published: 4/20/2020 - Chaos Space Marines, Tau, Legion, Shepard
The Last Manhunter by Fire Wolf 2132 reviews
What was supposed to be the day of his greatest honor became the day of his greatest loss. Now in a world and a time he does not recognize, J'onn J'onzz must face a choice. He can easily hide himself and his abilities for his safety. Or, he can be what he was meant to be. A Manhunter.
Crossover - Justice League & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 34,721 - Reviews: 77 - Favs: 222 - Follows: 297 - Updated: 2/15 - Published: 6/16/2021 - [J'onn J./Martian Manhunter, Tali'Zorah] Garrus V., Shepard
Whitley Shepard: The Commander's Brother by Hadrian Kallig reviews
Whitley Schnee couldn't take it anymore. The soul crushing loneliness was too much for the boy, and he ended up taking his life. However, in a twist of fate, an amnesiac Whitley ends up being found by Hannah Shepard. Years later, as a fresh faced engineering graduate, Whitley Shepard decides to join his sister's mission to hunt down Saren.
Crossover - Mass Effect & RWBY - Rated: M - English - Romance/Family - Chapters: 15 - Words: 32,695 - Reviews: 79 - Favs: 243 - Follows: 292 - Updated: 2/14 - Published: 4/20/2021 - [Garrus V., Shepard] [Whitley S., Tali'Zorah]
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: 15 - Words: 38,605 - Reviews: 20 - Favs: 15 - Follows: 16 - Updated: 2/14 - Published: 6/7/2021
Mass Effect-Batman: Crisis On The Citadel by James Keller reviews
After 2 years of operating on Omega, The Dark Knight comes to the Citadel in pursuit of a dangerous new drug that is about to be unleashed upon the very heart of Council Space. This will put him into an alliance with Lt. Garrus Vakarian of C-Sec's Major Crimes Unit as they uncover a massive Conspiracy.
Crossover - Mass Effect & Batman - Rated: M - English - Crime/Mystery - Chapters: 3 - Words: 21,240 - Reviews: 7 - Favs: 18 - Follows: 20 - Updated: 2/13 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
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: 5 - Words: 8,424 - Reviews: 25 - Favs: 39 - Follows: 85 - Updated: 2/13 - Published: 8/5/2021 - The Emperor, Primarch/s, Shepard, OC
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: 42 - Words: 599,482 - Reviews: 2175 - Favs: 3,389 - Follows: 4,167 - Updated: 2/13 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
Imperial Scales by Lighting wolf knight reviews
To them? the fact that they were entirely thrown into a new battlefield was entirely amusing. Next chapter will be delayed. Rated T for violence, death, and profanity.
Crossover - Warhammer & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 816 - Reviews: 4 - Favs: 7 - Follows: 6 - Published: 2/12 - [OC, Nyreen K.] Space Marines
Earth's Defense by shdowstep reviews
It was too late. Despite the warnings given, the Reapers made their way to Earth, and the Harvest began once more. But the Reaper's miscalculated. Humanity was not alone on Earth - Gaia and Alaya existed as well. And they already had various plans in place to survive an extinction level event.
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Chapters: 2 - Words: 2,468 - Reviews: 37 - Favs: 176 - Follows: 262 - Updated: 2/11 - Published: 2/5
Of Shepards and Imperials by Mandrake109 reviews
One of the oldest living perpetuals along with the remains of an inquisitorial retinue are transported into an alternative past where aliens are not simply foes to slay but friends and allies to mankind. For the perpetual it's a nice change of pace for the others? Well they may learn that co-existence might not be such a bad thing after all... Rated M for obvious reasons.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 7 - Words: 83,393 - Reviews: 57 - Favs: 163 - Follows: 225 - Updated: 2/11 - Published: 3/7/2019 - Imperial Guard, OC, Shepard
Another Place, Another Time by Snafu1000 reviews
AU. Erin Shepard. Talia Cousland. Alistair Theirin. A resurrected Spectre and her two best friends are trying to save the galaxy, but a side mission to take on the Shadow Broker complicates the hell out of the life of one grouchy grunt who just wants to keep things simple.
Crossover - Mass Effect & Dragon Age - Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 30,632 - Reviews: 50 - Favs: 31 - Follows: 38 - Updated: 2/11 - Published: 7/26/2015
The Final Olympian by TheSilverboar reviews
Percy Jackson. Alive since before humanity even reached Mars, wandering in solitude. But as Saren tries to destroy the galaxy he can't stand Idly by and returns to Alliance Space to help stop this new threat to his species. (Male Sheppard)
Crossover - Percy Jackson and the Olympians & Mass Effect - Rated: M - English - Sci-Fi/Friendship - Chapters: 2 - Words: 2,942 - Reviews: 25 - Favs: 300 - Follows: 360 - Updated: 2/11 - Published: 11/6/2021 - Percy J., Ashley W., Tali'Zorah, Shepard
Mass Effect demi humans by EclipsePheniox reviews
Long ago on earth demi-humans appeared on earth. Now expanding into the galaxy the other races have to deal with both humans and demi-humans. Mass effect story from beginning to end but with monster people to make it more interesting. Experimental, possible harem
Crossover - Mass Effect & Monster Girl Encyclopedia - Rated: M - English - Adventure/Sci-Fi - Chapters: 29 - Words: 100,847 - Reviews: 40 - Favs: 197 - Follows: 198 - Updated: 2/11 - Published: 8/2/2019
StellarEffect: The Imperial Chronicles by Jack Smith1 reviews
The Empire is in a time of Peace and prosperity, After Crown Princess Sarah Led the Fremas Offensive during the Fremas Rebellion where Imperial Forces clashed with Traitors and Renegade Elements of Imperial Society, Only for the Empire to finally Emerge Triumphant, But a new threat emerges and a Whole new galaxy is now aware of them, Irene Protects, Let no one be found wanting.
Crossover - Mass Effect & Stellaris - Rated: M - English - Sci-Fi/Drama - Chapters: 4 - Words: 14,037 - Reviews: 8 - Favs: 46 - Follows: 54 - Updated: 2/11 - Published: 1/16 - [Shepard, Ashley W.] Admiral Hackett, OC
Star-Bound by The Incredible Muffin reviews
Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 34 - Words: 231,850 - Reviews: 971 - Favs: 1,155 - Follows: 1,453 - Updated: 2/10 - Published: 5/29/2019
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: 20 - Words: 117,960 - Reviews: 127 - Favs: 244 - Follows: 258 - Updated: 2/9 - Published: 10/22/2017 - Zeratul, Saren A., Javik, Tarquin Victus
Fall of the Citadel (Re Write) by UnicronEatsTheCitadel reviews
Skynet will not go quietly into the night. This cycle may be different. The future is not set.
Crossover - Terminator & Mass Effect - Rated: T - English - Sci-Fi/Suspense - Chapters: 2 - Words: 1,555 - Reviews: 11 - Favs: 55 - Follows: 105 - Updated: 2/9 - Published: 6/25/2020 - Skynet, OC, Illusive Man, Hannah S.
The Eternal Lord 40k - ME by HellFox83 reviews
A battle against the forces of Chaos strands a Necron lord in the galaxy of Mass Effect. With what's left of his dynasty under his banner, Veronakh Lord of Solvatakh intends to lead his people to glorious conquest. Can Commander Shepard stop the Collectors and curtail the ambitions of the Necrons?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 198,398 - Reviews: 92 - Favs: 277 - Follows: 391 - Updated: 2/9 - Published: 6/13/2020 - Necrons, Shepard
Mass Effect: Ages of Myst by IX404 reviews
Upon his mother's death, Garrus, and his father Castis, learns of a book that she was gifted shortly before her passing. What neither of them know, is that they will soon journey on an adventure across the Ages, while solving the mysteries of Myst, Riven, and beyond.
Crossover - Myst/Riven & Mass Effect - Rated: T - English - Adventure/Suspense - Chapters: 7 - Words: 37,103 - Reviews: 6 - Favs: 7 - Follows: 10 - Updated: 2/9 - Published: 1/20 - Atrus, Catherine, Garrus V.
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: 12 - Words: 57,996 - Reviews: 25 - Favs: 54 - Follows: 82 - Updated: 2/8 - Published: 9/7/2021 - Miranda L., OC, Team RWBY
The silver eyed agent by stefaniuss reviews
Even the smallest pebble can produce an avalanche, something that a out of his luck smuggler is about to find out. This is the story of Lena, silver eyed warrior of the latest generation forced to fight against an enemy far stronger than any yoma, but at the same time so familiar. Will she survive?
Crossover - Claymore & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 39 - Words: 277,952 - Reviews: 36 - Favs: 100 - Follows: 115 - Updated: 2/8 - Published: 1/4/2018 - [OC, Kelly C.] Mordin S., Shepard
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