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Angelus Sanguis Humani by Ronin2106 reviews
Sanguinius manages to overcome Horus and with his final breath, he saves his sons and the Imperium, yet his soul is not taken by Dark Gods. Instead, he is reborn in a universe, where Humanity is only making it's first steps into the Galaxy, and is fighting the First Contact War. Imperium and Emperor are gone, but Humanity is here, and the Great Angel will never abandon it.
Crossover - Warhammer & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 13 - Words: 129,498 - Reviews: 739 - Favs: 1,015 - Follows: 1,260 - Updated: 6h - Published: 6/10 - Primarch/s, D. Anderson, Admiral Hackett
Ship of The Line – Effect 31 by Knife Hand reviews
Bored with how things are going to play out, Janus interferes more directly in Halloween, making things more interesting and changing the course of the entire Galaxy. (Buffy/Star Trek/Mass Effect) - Chapter 13 up
Crossover - Buffy: The Vampire Slayer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 22,853 - Reviews: 128 - Favs: 485 - Follows: 665 - Updated: 10h - Published: 10/16/2019 - Xander H., Buffy S., Willow R.
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: 51 - Words: 226,036 - Reviews: 213 - Favs: 331 - Follows: 450 - Updated: 10h - Published: 8/7/2022
Saga of the Bridgers-Year 6 by Ganel750 reviews
A new Menace. As the war between the Coalition and the Empire enters a standstill, entire colonies at the edge of Wild Space start disappearing. When a new enemy will prove to be a threat to both sides in the conflict, enemies will have to join forces to prevent this new menace from conquering the galaxy.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 36 - Words: 204,840 - Reviews: 12 - Favs: 27 - Follows: 22 - Updated: 7/22 - Published: 8/17/2022 - Thrawn, OC, Ezra B., Shepard - Complete
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: 40 - Words: 295,674 - Reviews: 47 - Favs: 228 - Follows: 287 - Updated: 7/22 - Published: 1/5/2022 - Lone Wanderer, Courier, OC
Sith Effect Episode I: First Contact by Metagray reviews
The ruins of Mars belonged not to the protheans but to humanity's ancestors, the Sith Empire. How will the Citadel react to a race that not only doesn't use mass effect technology, but is an anathema to their ideals. When the turians find the Sith, they face a war unlike any this galaxy has seen. The First Contact War has begun. Peace is a lie, there is only passion.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 140,024 - Reviews: 625 - Favs: 1,561 - Follows: 1,998 - Updated: 7/21 - Published: 12/3/2022 - D. Anderson, Admiral Hackett, Rael'Zorah, OC - Complete
The Wayfarer by Umbral Choir reviews
In the twilight of the universe the Ihan-rii, a forgotten sect of protoss, face an uncertain future in a realm consumed by the hounds of the void and their dark master. Xiltar, the last member of the umbral choir will guide his people into a fate beyond the designs of the Xel'naga only to find that he traded one war of annihilation for another.
Crossover - StarCraft & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 46 - Words: 202,635 - Reviews: 48 - Favs: 110 - Follows: 134 - Updated: 7/21 - Published: 2/5
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: 4 - Words: 92,408 - Reviews: 61 - Favs: 182 - Follows: 221 - Updated: 7/21 - Published: 6/6 - Garrus V., Tali'Zorah, Shepard
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 & Spork
Crossover - Mass Effect & RWBY - Rated: M - English - Adventure - Chapters: 76 - Words: 304,817 - Reviews: 784 - Favs: 772 - Follows: 1,060 - Updated: 7/21 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness
Atonement by RJM3994 reviews
After finally dying, he expected to find peace. But he must atone for the mistakes of his life in this new universe. Revan in Mass Effect and HK-47 too for chaos.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Romance - Chapters: 5 - Words: 10,062 - Reviews: 9 - Favs: 24 - Follows: 32 - Updated: 7/19 - Published: 7/15 - [Revan, J. Garson] HK-47
Here There Be Monsters by J-Litt-Press
What was supposed to be a training run for the crew of the USS Spirit of Fire turns into a fight for survival. An ancient evil has returned to wipe out all life in the galaxy, and the galaxy has descended into chaos and war. This brave ship and crew will travel to the darkest parts of space, fight impossible odds and face terror unimaginable to save the galaxy.
Crossover - Star Wars & Mass Effect - Rated: M - English - Horror/Adventure - Chapters: 1 - Words: 2,407 - Favs: 3 - Follows: 4 - Updated: 7/18 - Published: 6/21
Amphibia Effect: Dawn of the Reapers by Gunslinger245 reviews
Anne thought her war was over. She can finally return home safely with the Core defeated and Amphibia safe. Boy, how wrong could she have been? Now she and her friends are thrust into an alternate universe, facing a threat much worse than the Core. What if instead of sending them home, the Calamity box sends the trio to the Mass Effect universe and forces them to fight the Reapers?
Crossover - Mass Effect & Amphibia - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 10,013 - Reviews: 3 - Favs: 5 - Follows: 3 - Published: 7/18 - Shepard, Anne, Sasha, Marcy
Feared Reverence by ayab reviews
376 years after the battle between heaven and earth. Two humans have achieved godhood. Using their power to guide humanity to the stars. How will the galaxy react to see a species so advanced yet so primitive? So powerful yet not wanting to use their power. They are what the citadel race aspires to be and hates because of their jealousy. (up for adoption.)
Crossover - Naruto & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 9 - Words: 24,215 - Reviews: 76 - Favs: 219 - Follows: 296 - Updated: 7/18 - Published: 1/14
When magic decides one war isn't enough by Alykto reviews
Following Voldemort's return after the Triwizard Tournament, Dumbledore realized he couldn't possibly handle the incoming conflict on his own. He needed a general to prepare the war. His summoning ritual then dragged Commandant Shepard, Specter and N7 Alliance Marine fighting the Reapers to 12 Square Grimmault.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 4 - Words: 6,122 - Reviews: 7 - Favs: 9 - Follows: 18 - Updated: 7/18 - Published: 6/29 - Harry P., Ron W., Hermione G., Shepard
Eddie of the Stars by Primordial-wielder
(AU) Being the only adolescence human on a isolated backwater space station while having secret modifications within him due to illegal experimentation is something Eddie has grown to accustom to. But having the only adolescence Tsktskian around falling for him after accidentally saving her life though is something that almost makes him wish that he had died in that laboratory.
Crossover - Mass Effect & Lloyd in Space - Rated: T - English - Sci-Fi/Romance - Chapters: 1 - Words: 6,152 - Favs: 2 - Follows: 2 - Published: 7/17 - [Eddie H., Brittany B.] SAM, Lloyd N.
Dawn of Titans by F13D reviews
There is nothing fair, just, or honorable about war. There is only winning and losing, the living and the dead. Humanity has learned this truth and has ascended to the stars. What effect will this have on the rest of the galaxy, one that has experienced millennia of peace? Will it be able to maintain the peace or will it be ushered into a new age of war? Let the end begin. A/U
Crossover - Mass Effect & EndWar - Rated: M - English - Sci-Fi/Adventure - Chapters: 37 - Words: 391,432 - Reviews: 732 - Favs: 1,084 - Follows: 1,312 - Updated: 7/17 - Published: 7/15/2015 - D. Anderson, Admiral Hackett, OC
The Good Shepherd: Season One by Dingo32 reviews
In her time Carrie white was the first human biotic, but she was driven to insanity, slaughter and apparent suicide by the cruelty of those around her. In another age her gift of natural biotics holds the key to a better life for those of her ilk, but that may not be all she has to offer the galaxy. Undergoing rewrite.
Crossover - Mass Effect & Carrie - Rated: M - English - Sci-Fi/Supernatural - Chapters: 3 - Words: 28,421 - Reviews: 26 - Favs: 75 - Follows: 110 - Updated: 7/17 - Published: 5/6/2016
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: 9 - Words: 102,160 - Reviews: 76 - Favs: 203 - Follows: 285 - Updated: 7/16 - Published: 3/7/2019 - Imperial Guard, OC, Shepard
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 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: 15 - Words: 194,967 - Reviews: 480 - Favs: 1,008 - Follows: 1,390 - Updated: 7/15 - Published: 4/30/2020
The Milky Way's Solo by Likeableheart reviews
V finds himself away from Night City and dealing with a whole new environment where there's aliens, politics, and whole new planets. How will the former Corporate rat turned netrunning solo react to this? Will the galaxy notice this new individual, or will he fade as a Mr. Nobody?
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 22,662 - Reviews: 63 - Favs: 311 - Follows: 452 - Updated: 7/15 - Published: 1/20/2021 - OC, V, Johnny Silverhand
The Serpent's Venom by Lighting wolf knight reviews
All Alpha Legion warbands were different... And insanely weird... They are no different. Rated T for violence, profanity, and death. Doesn't entirely follow lore. Focusing more on Alpha Legion's infiltration and planning abilities and uncertain allegiances to chaos and the imperium and chaos... No OP Chaos Marines.
Crossover - Warhammer & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 2,931 - Reviews: 1 - Favs: 7 - Follows: 15 - Updated: 7/14 - Published: 7/8 - Chaos Space Marines, OC, Admiral Hackett, Illusive Man
Paracausal Effect by Aquilarion reviews
After discovering what Light and Dark truly were— after finding Balance in their universe, Elsie Bray discovers a secret to the Guardian that forces him to act. Forces them both to act. The Darkness moves once again. Only this time, not in their universe. [FemShep] [M for safety]
Crossover - Mass Effect & Destiny - Rated: M - English - Adventure/Sci-Fi - Chapters: 7 - Words: 31,014 - Reviews: 17 - Favs: 76 - Follows: 121 - Updated: 7/13 - Published: 3/12 - [Exo Stranger, Guardian] Liara T'Soni, Shepard
A Bar at the End by n7kairos reviews
Two soldiers at the end of their wars meet at a bar. Just not the ones they were expecting.
Crossover - Call of Duty & Mass Effect - Rated: T - English - Angst/Sci-Fi - Chapters: 1 - Words: 822 - Reviews: 2 - Favs: 4 - Follows: 8 - Published: 7/12 - Cpt. John Price, Garrus V., Shepard - Complete
Rise of the Federation Alliance: Federation-Citadel War by SimplyLaggy reviews
( AU) A Citadel Council patrol fleet stumbles upon a Starfleet exploratory fleet who just discovered a mass relay, and fires on it, sparking a war on levels beyond the Citadel's imaginations! Meanwhile, Reapers detect these newcomers, and with their superiority complex, attack early! Meanwhile, Q sits on a beach chair munching popcorn, watching, and laughing!
Crossover - StarTrek: The Next Generation & Mass Effect - Rated: T - English - Chapters: 4 - Words: 8,143 - Reviews: 40 - Favs: 155 - Follows: 222 - Updated: 7/11 - Published: 2/21 - J. Picard, Admiral Hackett, Shepard
Mass effect: the Sovereign crisis 1 by micelzod reviews
After discovering a cache of prothean technology on Mars in 2090, humanity is spreading to the stars; the newest interstellar species is struggling to carve out its place in the great galactic community. But no one ever asks, What happened to the Prothean? It's up to a brave few to uncover a dark truth while stopping a rogue agent from carrying out his unknown master's plan.
Crossover - Mass Effect & EndWar - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 7,481 - Reviews: 1 - Favs: 8 - Follows: 8 - Published: 7/10 - [Ashley W., OC] Shepard
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