Mass Effect Crossovers
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Marathon Effect by IX404 reviews
After dying thousands of times, and winning hopeless encounters, Roland Hector, Chief Security Officer of the UESC Marathon, also known as Mjolnir Recon number 54, finally succeeds in trapping the W'rkncacntr. Little does Roland and Durandal know is that they will soon be involved in another race against an enemy that seeks to destroy Humanity and it's allies.
Crossover - Marathon & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 24,758 - Reviews: 23 - Favs: 45 - Follows: 68 - Updated: 3/24 - Published: 11/20/2024 - Durandal, Cyborg, Garrus V., Shepard
The Call to War by silencewillfall0091 reviews
In 2550 CE, 25 years into our war with the Covenant, a Turian fleet exploded out of the ice moon orbiting Lusitania. The Hierarchy, aching for a war since the humiliation of the Rachni invasion, stumbled into the most brutal conflict in recent galactic history.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 4,022 - Reviews: 21 - Favs: 108 - Follows: 158 - Updated: 3/24 - Published: 2/2
Book One: Harvest by Believer218 reviews
The year is 2583. Humanity stands strong, even twenty-six years after a disastrous first contact. But it seems that wherever they go, war will follow. And this war will grip the galaxy like no other. The first adventure of Mass Effect: The Reclaimer Saga. Rated M for graphic depictions of violence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 42,184 - Reviews: 123 - Favs: 132 - Follows: 191 - Updated: 3/23 - Published: 4/4/2024 - [Master Chief/John-117, Ashley W.] Arbiter, Saren A.
Echoes of the Forerunners: A Covenant Unveiled (Hiatus) by Phorus Aedelmaer reviews
The Covenant War erupts with far-reaching consequences across two universes. As the UNSC struggles to survive, they form an unexpected alliance with the species of the Citadel Council. Creative liberties will be taken with the timelines, events, and characters of both franchises.
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 18 - Words: 33,532 - Reviews: 166 - Favs: 195 - Follows: 279 - Updated: 3/22 - Published: 9/8/2024 - Complete
Let There Be Light (To Be Rewritten) by Phorus Aedelmaer reviews
The Imperium of Man arrives in the Mass Effect galaxy, igniting war with the Citadel Council. As the Imperium sees only heresy, the Council scrambles to survive. The Reapers, faced with an empire that defies their cycle, prepare to adapt. With war looming, the fate of the galaxy hinges on whether diplomacy or extermination prevails.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 12 - Words: 23,442 - Reviews: 77 - Favs: 182 - Follows: 217 - Updated: 3/22 - Published: 1/29 - Complete
Tali'Zorah: Demonologist by Sheev314 reviews
I DO NOT OWN MASS EFFECT ALSO THE FIRST TWO CHAPTERS WILL HAVE HORROR ELEMENTS IN IT Tali'Zorah's pilgrimage on a haunted world turns into an adventure with the demon known as Shepard. Can she and her new infernal friend save the galaxy from the Reapers, or will the universe burn in the fires of a new war.
Crossover - Mass Effect & Pathfinder RPG - Rated: M - English - Sci-Fi/Horror - Chapters: 5 - Words: 26,454 - Reviews: 16 - Favs: 33 - Follows: 45 - Updated: 3/21 - Published: 11/19/2024 - Tali'Zorah, Shepard
The True Way Of The Sith - Part Two by Writing Shop 12 reviews
Sequel to The True Way Of The Sith. The Mass Effect Relay has been activated and a whole new galaxy of opportunity comes with it. What will Lily Potter, the Crown Princess of the Sith Empire, do with this new chance for adventure? And more importantly, will her father let her go into the unknown on her own? Citadel space beware, the Sith have come. (Harry x Harem) (Lily x Shepard)
Crossover - Harry Potter & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 8 - Words: 41,138 - Reviews: 510 - Favs: 2,785 - Follows: 3,531 - Updated: 3/21 - Published: 1/8/2023 - Harry P., Liara T'Soni, 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: 51 - Words: 168,710 - Reviews: 71 - Favs: 324 - Follows: 343 - Updated: 3/21 - Published: 8/2/2019
Operation ECLIPSE by HelenTheMoon reviews
Pre-ME1 post-Frontiers Xover, in which the Sonic version of Earth replaces ME Earth. A Batarian planet suddenly turns invisible, and things only get weirder from there. That poor STG agent won't know what hit him, that's for sure. And neither will the rest of the galaxy - once Sonic and Eggman get there. Crossposted on Spacebattles and AO3. Rating may change. NOW ON TV TROPES!
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 14 - Words: 157,611 - Reviews: 89 - Favs: 126 - Follows: 153 - Updated: 3/20 - Published: 11/26/2023 - Sonic, Tails, OC
Mobile Suit - Mass Effect: The First Contact War by Mister Smallville reviews
Two worlds collide, neither prepared for the other. The Solar Sphere Congress -successor to the long gone Earth Federation- unwittingly starts a galactic crisis when it makes first contact with a very angry, very trigger happy Turian Hierarchy.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 30 - Words: 197,721 - Reviews: 361 - Favs: 520 - Follows: 701 - Updated: 3/20 - Published: 8/7/2023
Mass Effect: Legend of Vader by Gaming Lichdom reviews
Darth Vader attempts to resurrect his deceased wife through an ancient ritual, but is pulled into the machine and transported to an unknown planet. On his quest to return home, he comes across a Quarian woman named Tali'Zorah, who just so happens to have information about a rogue Spectre Named Saren. The two form a strange duo as they venture on a quest to save the galaxy.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 18,031 - Reviews: 42 - Favs: 169 - Follows: 258 - Updated: 3/19 - Published: 10/30/2024 - [Darth Vader, Tali'Zorah] Garrus V., Shepard
Estrella y Masa se Conocen by dark platinum reviews
Anthon fankhauser y John Shepard son dos individuos reconocidos por sus respectivos gobiernos como héroes de renombre, la única diferencia es la escala en la que operan, uno a salvado a un sector entero mientras que el otro a salvado a una galaxia entera, que ocurrirá cuando el primero se encuentre con el segundo.
Crossover - Mass Effect & Starfield - Rated: M - Spanish - Adventure/Sci-Fi - Chapters: 4 - Words: 42,849 - Reviews: 4 - Favs: 8 - Follows: 10 - Updated: 3/18 - Published: 5/24/2024 - Miranda L., Shepard, Sarah Morgan, OC
Mass Effect: ODST Lost by Fantasy Theatre reviews
ODST Captain Nathanial Renkov unintentionally becomes the first Helljumper to survive being dropped through a Slipspace anomaly. The problem? He has no idea where is and is surrounded by aliens the UNSC has no record of. Even worse? No one knows what the UNSC is. Follow his story as he tries to make sense of his new surroundings while trying to survive a new galactic threat.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 19,811 - Reviews: 26 - Favs: 135 - Follows: 201 - Updated: 3/18 - Published: 4/24/2022 - OC, Ashley W., Tali'Zorah, Shepard
Drake, Emissary by Scififan33 reviews
Tim could say with certainty that he was having a bad day. Stupid magician, stupid spells. They had a plan to deal with him, they did! That plan did not involved Tim being hit. Or waking up on an alien planet. But he could adapt. But what he really wanted was to go home. Since he couldn't, he'd help them find a way to peace with their creators, they had saved his life after all
Crossover - Batman & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 37,133 - Reviews: 31 - Favs: 87 - Follows: 112 - Updated: 3/18 - Published: 8/24/2024 - Timothy D./Red Robin, Tali'Zorah, Shepard
The Terminus Exarchate by infamouswestgate reviews
Qelet B'Norai, Batarian cartel-kin and agent of the Covenant, travels the swallowed-yet-undigested worlds of the Terminus Exarchate! Can he save the Covenant Empire from collapsing underneath its own great weight?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 31 - Words: 94,790 - Reviews: 42 - Favs: 21 - Follows: 30 - Updated: 3/17 - Published: 9/11/2024
Percy Jackson, The Original N7 by GearTrail reviews
Commander Kate Shepard, commanding officer of the Normandy, was resurrected by Cerberus after the Normandy SR 1 was destroyed in a surprise attack by the Collectors. But even with her new mission, she couldn't forget her own, one that was passed down to her as a legacy of one of the greatest heroes Earth had, the long lost demigod Percy Jackson.
Crossover - Percy Jackson and the Olympians & Mass Effect - Rated: M - English - Fantasy/Sci-Fi - Chapters: 4 - Words: 27,674 - Reviews: 5 - Favs: 50 - Follows: 81 - Updated: 3/17 - Published: 1/5/2024
Expanded sky by mantale3 reviews
The alliance encounter the aliens of the Milky Way Galaxy.
Crossover - Firefly & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 3 - Words: 2,392 - Reviews: 10 - Favs: 14 - Follows: 18 - Updated: 3/16 - Published: 11/12/2024
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: 17 - Words: 47,826 - Reviews: 18 - Favs: 85 - Follows: 102 - Updated: 3/16 - Published: 1/3/2023 - Liara T'Soni, Miranda L., 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: 41 - Words: 144,496 - Reviews: 242 - Favs: 703 - Follows: 1,004 - Updated: 3/16 - Published: 7/8/2022 - Rookie, Shepard
The Last Shinobi by derTraeumer reviews
Fifty thousand years ago, the shinobi world fell to the Reapers, their potential too great a threat. Akane Uchiha, the last surviving kunoichi, awakens in the modern galaxy on Eden Prime. Joining Commander Shepard's fight, she blends ancient ninja skills with advanced tech to preserve this cycle from annihilation and ensure no world shares her home's tragic fate.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 44 - Words: 251,171 - Reviews: 62 - Favs: 207 - Follows: 260 - Updated: 3/13 - Published: 7/4/2019 - OC, Admiral Hackett, Shepard
In Pursuit of Purpose by Bodacity2.0 reviews
An account of the adventures of one of the Emperor's Adeptus Custodes, and his attempts to accomplish his sole mission in a universe where that matters little. While introducing the grim darkness of the far future to Citadel Space, his journey leads him along an unexpected path.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 27,172 - Reviews: 23 - Favs: 95 - Follows: 129 - Updated: 3/12 - Published: 2/19 - OC, Garrus V., Ashley W., Shepard
The Galaxy's last shinobi by Kfbanime87 reviews
As for summary. His planet and people were gone. Destroyed by the reapers. But he survived. Now thousands of years in the future, Naruto must navigate a galaxy unfamiliar to him along with his ragtag crew of friends. All while he makes a name for himself and makes plans to destroy the reapers when they return
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 9 - Words: 85,578 - Reviews: 510 - Favs: 926 - Follows: 1,021 - Updated: 3/10 - Published: 3/27/2023 - Naruto U., Shepard
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: 41 - Words: 281,374 - Reviews: 1203 - Favs: 1,622 - Follows: 1,959 - Updated: 3/10 - Published: 5/29/2019
In a Galaxy Far Away by Emmett Brown reviews
After his death in the battle against the Emperor and saying his last goodbyes to his son Luke, Darth Vader, now Anakin Skywalker once more, thought he would go back to force. But instead he finds himself in a whole new galaxy tangled with a crew of unknowns and a new threat. This is his second chance, and he doesn't intend on throwing it away.
Crossover - Star Wars & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 11,515 - Reviews: 19 - Favs: 63 - Follows: 95 - Updated: 3/8 - Published: 2/24 - Anakin Skywalker, Shepard
Solar Knight by SirPotat reviews
A warrior estranged from the lands he fought to save. Facing an expanse far larger than he could ever comprehend. That however is irrelevant, for he is not just a Guardian, he is a Titan. He is a warden against evil and a shield for the weak. No matter where he is, no matter his circumstances. He will fight, for that is what he was reborn to do.
Crossover - Mass Effect & Destiny - Rated: M - English - Chapters: 3 - Words: 9,233 - Reviews: 15 - Favs: 56 - Follows: 73 - Updated: 3/6 - Published: 1/14 - OC
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