Mass Effect Crossovers
Filters
3.5K | Page 1 2 3 4 11 .. Last Next »

The Return of Hope by Masso 2010 reviews
Commander Shepard is dead. Knowing that they needed someone to complete his work fighting against the Reapers, The Illusive Man set his sights on the next best thing, Humanities greatest hero. The only problem is that Superman gave up on hero work a long time ago but can the threat of galactic extinction be enough for him to once again step into the light.
Crossover - Superman & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 34 - Words: 277,647 - Reviews: 335 - Favs: 754 - Follows: 850 - Updated: 13h - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
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: 67 - Words: 294,670 - Reviews: 264 - Favs: 395 - Follows: 515 - Updated: 16h - Published: 8/7/2022
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: 45 - Words: 787,499 - Reviews: 692 - Favs: 627 - Follows: 652 - Updated: 1/6 - Published: 9/13/2020 - Axel, Roxas, Xion, Shepard
Rising from the Embers of Sera by thehappy reviews
The people of Sera rebuild, spreading to the stars. Wars will be waged. Peace will be sought. The Coalition has risen from the ashes to take their right to exist in the galaxy. They will survive...no matter the cost.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 25 - Words: 381,034 - Reviews: 408 - Favs: 688 - Follows: 813 - Updated: 1/6 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
SAGE EFFECT by The Guarding Dark reviews
Dying at the tender age of nineteen sucked. Being reborn In a doomed future. With a Pair of Rinnegan eyes, and an apocalypse bearing down on me. Sucked even more. And being born on Mindoir certainly didn't help matters. (Rated M for extreme blood and gore as of chapter ten, read at your own risk. Possible OCXFemshep.)
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Drama - Chapters: 21 - Words: 77,598 - Reviews: 501 - Favs: 1,188 - Follows: 1,536 - Updated: 1/6 - Published: 9/8/2014 - Shepard, OC
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: 10 - Words: 33,616 - Reviews: 13 - Favs: 65 - Follows: 80 - Updated: 1/5 - Published: 1/3/2023 - Liara T'Soni, Miranda L., Shepard
Mortal Desperations by Solthrin reviews
Arcturus Magnus, Sagittarum of the Legio Custodes, has fought for years within the webway and the Impossible City. Upon taking a near-fatal wound, the Emperor Himself removes Arcturus from the front, sending him instead to bring forth reinforcements from the Mechanicum. When something goes wrong during the return, where does this Custodian find himself?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 53,136 - Reviews: 101 - Favs: 471 - Follows: 693 - Updated: 1/5 - Published: 1/17/2023 - Adeptus Mechanicus, Tali'Zorah, Shepard
Percy Jackson, The Original N7 by GearTrail
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: 1 - Words: 5,632 - Favs: 13 - Follows: 20 - Published: 1/5
The Sword of the Geth by Doctor poo and the TURDIS reviews
Dying on Mantle's Approach, Cortana wakes up in an unfamiliar environment. In her drive to get home, she 'employs' the assistance of the local synthetics. She never wanted to be a galactic overlord. But a UNSC AI in an environment woefully unprepared for one of her caliber makes an easy one.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 18 - Words: 90,872 - Reviews: 397 - Favs: 820 - Follows: 1,155 - Updated: 1/4 - Published: 11/23/2023 - Cortana, 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: 6 - Words: 30,441 - Reviews: 372 - Favs: 2,350 - Follows: 3,011 - Updated: 1/3 - Published: 1/8/2023 - Harry P., Liara T'Soni, Tali'Zorah, Shepard
The Eternal Cycle by Imperatix reviews
The Eternal Empire has carved a place in the galaxy through unity, duty, and faith. These tenants have allowed humanity to rule the stars, however it is uncertain times in the galaxy, with the Emperor's faithful being across the galaxy, it's only a matter of time before there is conflict.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 6,028 - Reviews: 13 - Favs: 56 - Follows: 68 - Updated: 1/3 - Published: 10/3/2023
The Last Shinobi by derTraeumer reviews
The number of shinobi drastically decreased over the past generations. People stopped using chakra as their source of power and focused on developing a modern society with the help of technology until they achieved space-flight and the Reapers harvested their civilization... all - except one. Follow the ninja way of the last living shinobi Akane Uchiha.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 38 - Words: 176,611 - Reviews: 51 - Favs: 174 - Follows: 225 - Updated: 1/3 - Published: 7/4/2019 - OC, Shepard
Operation ECLIPSE - Apocrypha and Sidestories by HelenTheMoon
Omakes, sidestories and Apocrypha written by me and others for Operation ECLIPSE. The Sidestories are canon, the rest just for fun. Feel free to submit content yourselves! (I'll credit you, obviously)
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Chapters: 5 - Words: 7,472 - Favs: 9 - Follows: 5 - Updated: 1/3 - Published: 12/25/2023
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: 6 - Words: 38,922 - Reviews: 15 - Favs: 34 - Follows: 44 - Updated: 1/2 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
Mass Cross Frontier by weebee reviews
The culmination of several terrible ideas. From an il-advised scientific expedition, to the Illusive man's shifting plans, to a couple of authors who should really know better. No, it's not what you think.
Crossover - Anime X-overs & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 5 - Words: 59,537 - Reviews: 20 - Favs: 56 - Follows: 75 - Updated: 1/2 - Published: 1/29/2021
Exciting Opportunities by Of Questionable Veracity reviews
In an unexpected and highly unlikely turn of events, a catastrophic warp breach from a crippled ship manages to fling a Rogue Trader - or rather, the youngest son of a Rogue Trader - through time and space to a universe quite unlike what anyone on-board in used to. They make the best of the situation.
Crossover - Warhammer & Mass Effect - Rated: K+ - English - Chapters: 40 - Words: 230,255 - Reviews: 567 - Favs: 769 - Follows: 1,074 - Updated: 1/2 - Published: 4/15/2019 - J. Garson
War of the Old Ones by Ian the Mechanic reviews
In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?
Crossover - Mass Effect & Halo - Rated: M - English - Sci-Fi/Horror - Chapters: 27 - Words: 150,741 - Reviews: 166 - Favs: 325 - Follows: 474 - Updated: 1/2 - Published: 2/21/2022
Imperial Warlord: Rewrite by deeed22 reviews
Two friends once cast adrift in a universe not their own find themselves in another. With their goals unknown, purpose not directed or forced, are they finally free to choose their own way?
Crossover - Warhammer & Mass Effect - Rated: M - English - Adventure - Chapters: 4 - Words: 14,727 - Reviews: 40 - Favs: 161 - Follows: 248 - Updated: 1/1 - Published: 8/30/2021 - Imperial Guard, OC, Adeptus Mechanicus
Robo Effect by Star Sage reviews
The Robotech wars are over. The survivors of Humanity and the Zentraedi are now alone in the universe, and so, come together, becoming something new, becoming Terrans. Now this race will find itself thrust into the galactic scene, as the Citadel Races and those beyond test these young upstarts, and in the shadows, old things begin to move.
Crossover - Robotech/Macross & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 63 - Words: 225,988 - Reviews: 636 - Favs: 902 - Follows: 976 - Updated: 1/1 - Published: 4/14/2015
Never Fade Away by Ideas-Guy reviews
Lives are cheap and money is everything. That's how the orphanage made its money - lending out children for human expirementation. L is an old man at the age of fifteen and he knows he doesn't have much time left. All that mattered was getting out, but he soon learns that the world is a lot bigger than Night City. And that the galaxy is a lot bigger than Earth.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Drama - Chapters: 49 - Words: 230,055 - Reviews: 346 - Favs: 1,074 - Follows: 1,202 - Updated: 1/1 - Published: 10/31/2022 - Shepard, V
Cursed by Hookshot25 reviews
Clayton Carmine has only known hate and carnage for so many years. But once he survives the war he hoped to die in, things get strange. When people need help he isn’t one to shy away, and while helping Baird he gets sent to a place in dire need of a man like him. A man that can’t be claimed by death as easily as his kin.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 110,707 - Reviews: 19 - Favs: 65 - Follows: 95 - Updated: 1/1 - Published: 4/10/2023 - C. Carmine, Samantha B./Sam, Shepard, Tali'Zorah
A Change of Fate by kaln7 reviews
The Colonials search for the Thirteenth tribe after the fall of their colonies maybe at an end, when they make contact with the Systems Alliance, but will Earth lend them a hand or will the Cylons destroy them all.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 113,475 - Reviews: 228 - Favs: 423 - Follows: 589 - Updated: 1/1 - Published: 4/8/2017
Stargate A New Age by kaln7 reviews
Shepard defeated the Collectors, but now he must face a universe different from his own, but his team won't be the only team to help him get through this uncertain future.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 151,582 - Reviews: 172 - Favs: 284 - Follows: 399 - Updated: 1/1 - Published: 4/6/2017
The Irregular Blade Effect by ferduran reviews
Sequel of Unlimited Rettousei. Had you ever wondered what would happen if the Citadel council meet a species that all its members have powers like the Asari but different, has a stronger military like the Turian, and tech more advance than the Salarian. All that without element zero, but more importantly, they do not want to follow their orders.
Crossover - Fate/stay night & Mass Effect - Rated: M - English - Fantasy/Sci-Fi - Chapters: 6 - Words: 62,024 - Reviews: 155 - Favs: 635 - Follows: 815 - Updated: 12/31/2023 - Published: 12/8/2021
Galaxia en Convergencia: El Acenso de Dax Cyband by saninkarurosu501
Han pasado 5 años desde que Dax Cyband llego a la Vía Láctea, su verdadera identidad esta oculta, nadie sabe de donde viene. Vive lo que hace mucho tiempo deseaba una vida de paz, pero la paz no es duradera, fuerzas obscuras compiten por la dominación de la galaxia. ¿Se quedara al margen? o ¿O será un caballero jedi por ultima vez?. La voluntad de la fuerza ha cambiado la historia
Crossover - Star Wars & Mass Effect - Rated: T - Spanish - Adventure/Sci-Fi - Chapters: 3 - Words: 23,026 - Favs: 1 - Follows: 5 - Published: 12/30/2023 - OC, Ashley W., Tali'Zorah, Shepard
3.5K | Page 1 2 3 4 11 .. Last Next »