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Mass Effect: Galaxy at war by palik reviews
A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival (Reaper Incursion Arc)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 28 - Words: 84,353 - Reviews: 515 - Favs: 1,125 - Follows: 1,605 - Updated: 7/5 - Published: 6/18/2020
The Halo Effect: War and Civilization by free man writer reviews
A crossover years in the works. Civilizations rise and fall but to those that do stand, they prosper. They Expand. They reach out across the stars. But of course, such is a Universal law, War is never far behind. War is a language all civilized races speak and it is war most are familiar with. Co-written with BulletStormX. Halo/Mass Effect with a dash of Star Wars.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 127,353 - Reviews: 360 - Favs: 741 - Follows: 974 - Updated: 7/4 - Published: 7/28/2020
Deliverance by HumanTsunami reviews
He has travelled the breadth of the wasteland multiple times over. From California to Washington DC to Colorado. He has delivered news and salvation. She has sacrificed everything for the Universe she loves. She came from nothing but she died with everything she could have hoped for. What happens when two unstoppable legends meet. The rules will change but war, war never changes.
Crossover - Fallout & Mass Effect - Rated: M - English - Drama/Adventure - Chapters: 9 - Words: 46,597 - Reviews: 24 - Favs: 75 - Follows: 127 - Updated: 7/4 - Published: 5/30/2021 - Courier, Shepard
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: 8 - Words: 73,718 - Reviews: 38 - Favs: 86 - Follows: 105 - Updated: 7/4 - Published: 4/30 - Master Chief/John-117, Cortana, Shepard, OC
HALO Mass convergence by SapphireDawn11709 reviews
Two Universe collide after the Forerunners fall and the Reapers return, will the two branches of Humanity placed in their respective Systems by a Forerunner Monitor unite or fall, only time will tell in this epic clash. When the UNSC Exploration and Research Vessel Light of Sol discover a strange artifact, they are opened up to the rest of the Galaxy after millennia of isolation.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 24 - Words: 82,670 - Reviews: 316 - Favs: 729 - Follows: 911 - Updated: 7/4 - Published: 9/18/2016 - Master Chief/John-117, Cortana, J. Garson, Tali'Zorah
Mass Effect - Convergence by Fallen2Pancake reviews
During a Batarian Slave Raid on the Systems Alliance Colony of Eden Prime unknown defenders both Human and of unknown alien origin aid in the defense. While the UNSC and XCOM join forces under a thought long dead UNSC Rear Admiral and navigate this new universe, how will the future of Mass Effect change and will it change for the better or worse. - Mass Effect - Halo - XCOM Cross.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 11,385 - Reviews: 10 - Favs: 77 - Follows: 108 - Published: 7/2 - SPARTAN-B312/Noble Six, OC, Admiral Hackett, Shepard
Starwatch by CruxMDQ reviews
A youthful lieutenant Shepard unknowingly facilitates the release of an ancient evil and sets in motion a chain of events that will greatly influence the outcome of the first contact with Citadel species - and potentially threaten the standing of humanity among them. (Contributions: BrokenLifeCycle, kishinokurobi, kyro2009)
Crossover - Mass Effect & Overwatch - Rated: T - English - Adventure/Sci-Fi - Chapters: 65 - Words: 360,142 - Reviews: 170 - Favs: 305 - Follows: 361 - Updated: 6/28 - Published: 6/29/2016 - Shepard, Amélie L./Widowmaker, Lena O./Tracer, G. Reyes/Reaper
Galatic effect by Shadowking001 reviews
If Star Wars and Mass Effect came together with a lot of Syfy and magic and many others? The reapers will not suspect a thing. join us for a tale of strangeness and more in here
Crossover - Mass Effect & Star Wars - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 6,886 - Reviews: 7 - Favs: 13 - Follows: 11 - Updated: 6/28 - Published: 5/5/2021 - OC, OC
Constant Effect by reinDank reviews
So this is why this primitives race hid when the night came.
Crossover - Mass Effect & Don't Starve - Rated: T - English - Horror/Supernatural - Chapters: 1 - Words: 371 - Reviews: 2 - Favs: 6 - Follows: 9 - Published: 6/27 - OC, Charlie - Complete
DOOM Effect: V2 by Zrocker119 reviews
Alexander Carter didn't accomplish anything truly worth noting during his life. So when he was offered a chance to make a difference in the overgrowing universe he accepted without much argument on his part. Now armed with the skills and knowledge of one of the deadliest and most feared warrior in existence, The Doom Slayer, Alex will make sure that all will know his name.
Crossover - Doom & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 45,535 - Reviews: 694 - Favs: 2,393 - Follows: 3,070 - Updated: 6/22 - Published: 3/25/2019 - Doomguy, Shepard
A War of Two Galaxies by JPfan0922 reviews
See what happens when the reapers invade the Star Wars Galaxy! Can Commander Shepard, the Normandy Crew, and the Systems Alliance help rid this new galaxy of the reapers? Can the Republic and Separatist Alliance put aside their many differences for the good of the galaxy? Find out in: A War of Two Galaxies! (Takes place right before Revenge of the Sith. Slightly altered time line)
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 13,194 - Reviews: 24 - Favs: 44 - Follows: 54 - Updated: 6/22 - Published: 4/4 - Anakin Skywalker, Obi-Wan K., Liara T'Soni, Shepard
Away from Home by reinDank reviews
We preserved. We survived the bombardment and the fallout. We adapted. But most importantly, we'll never forget. AU.
Crossover - Fallout & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 862 - Reviews: 8 - Favs: 12 - Follows: 16 - Published: 6/22 - OC, J. Garson, Joker - Complete
Larga vida al rey by TheLesserBeast333
¿Naves, alienígenas y planetas? Se supone que me había ido a dormir un par de horas y cuando me despierto me dicen que ha pasado 100,000 años. ¿Qué puede aportar un viejo mago a la era interestelar? ¿Caos? ¿Destrucción? ¿Revolucion? Aún no lo se, pero nunca le digo que no a una nueva aventura.
Crossover - Fairy Tail & Mass Effect - Rated: T - Spanish - Chapters: 1 - Words: 10,111 - Favs: 3 - Follows: 4 - Published: 6/21 - [Natsu D., Shepard] Miranda L.
The third way by Konradoziom reviews
Mankind has finally united after a long time. To do this, it was necessary to discover the ruins of an ancient civilization and a wrecked spaceship. But the ship and the ruins have a completely different technology. Is it a gift from heaven that allows for enormous development in many directions, or is it a danger of their existence? Humanity will have to find out about it.
Crossover - Starblazers & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 24 - Words: 72,215 - Reviews: 124 - Favs: 168 - Follows: 204 - Updated: 6/21 - Published: 2/20/2021 - Alex W./M. Kodai, A. Avatar/J. Okita, Nihlus K.
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: 17 - Words: 77,784 - Reviews: 31 - Favs: 68 - Follows: 94 - Updated: 6/21 - Published: 9/7/2021 - Miranda L., OC, Team RWBY
From the Barracks: Rise of Man - Montoya : The Prey by CrepeSquid
An research station on a jungle planet has gone dark. The squad known as the Dutch Girls has been sent to investigate. A Joint project with 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: 5,689 - Favs: 1 - Published: 6/20
Fire for Stellar Effect by vmoneywashere reviews
Somewhere along the lines of history, two Humanities would evolve in two galaxies. One of these Earths would unite an entire galaxy under its flag and defeat the unbidden. With no threats left in its home space, the United Nations of Solar Species decides that the Reapers make good target practice and invades to stop them. Extreme OP Humanity, AU, and curb-stomping Reapers.
Crossover - Mass Effect & Stellaris - Rated: T - English - Humor/Sci-Fi - Chapters: 10 - Words: 50,735 - Reviews: 54 - Favs: 296 - Follows: 358 - Updated: 6/19 - Published: 10/4/2021 - Tali'Zorah, Shepard, OC
Galactic Upheaval by palik reviews
Our closest planet was always a mistery to us. So close yet so enigmatic, for a reason. The Exploration of mars has brought many changes in Human sociaty, none more then the discovery of an Alien Beacon filled to the brim with technology and designs never thought possible. A scared Humanity ventures into the stars to carve out is own place in the galaxy. (Slight HFY, maybe not)
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 12 - Words: 22,482 - Reviews: 119 - Favs: 413 - Follows: 548 - Updated: 6/19 - Published: 7/2/2021
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: 6 - Words: 21,260 - Reviews: 60 - Favs: 187 - Follows: 246 - Updated: 6/19 - Published: 5/29 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
Kyubi Effect by Ninja65 reviews
Naruto has lived an interesting life. This is the story of his life after his original one. Full of adventures and technology Naruto couldn't have even fathomed. Will he find himself in this new life he has to start. Will he find love even ... Heck yea he will. Naruto x Harem SlightAU Naruto
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 33,395 - Reviews: 40 - Favs: 191 - Follows: 258 - Updated: 6/17 - Published: 10/3/2021 - Naruto U., Hinata H., Liara T'Soni, Tali'Zorah
The First Interplanetary War by TimeTraveller-1900 reviews
Prospectors, pirates, failures and successes...A history of space travel in a combined Expanse and Mass Effect universe.
Crossover - Mass Effect & Expanse - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,369 - Reviews: 8 - Favs: 39 - Follows: 37 - Published: 6/17 - Complete
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
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure - Chapters: 43 - Words: 188,074 - Reviews: 523 - Favs: 625 - Follows: 868 - Updated: 6/17 - Published: 5/5/2019 - Legion, Pyrrha N., God of Darkness
The Boundary Effect - The Path of a Magician by xyzdreadnought reviews
Isika Valao is a young Asari child, with nothing to her name and a lot to prove. Enamoured by magic and the Alliance, she sets out to become what should Be impossible for the naturally biotic Asari, a magician. With the help of a certain ordinary Magician, she just might make that dream a reality. (A spin off Story to the Boundary Effect, written with Permission)
Crossover - Mass Effect & Touhou Project - Rated: T - English - Sci-Fi/Fantasy - Chapters: 12 - Words: 40,042 - Reviews: 49 - Favs: 193 - Follows: 265 - Updated: 6/17 - Published: 12/17/2018 - OC, Alice M., Marisa K.
Hero or Weapon? by The Plazmaster reviews
Colonel Benjamin Tennyson wasn't you're average Colonel. He had repelled the raiding party on Mindoir as a teen, saved Elysium, and tore through Torfan. He climbed the ranks of the Marines, all alongside his best friend Commander Rachael Shepard. Now he is to face the might of the Reaper army before the Cycle commences. Good thing he has a watch to tell him what time it is.
Crossover - Ben 10 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 3,392 - Reviews: 1 - Favs: 13 - Follows: 19 - Published: 6/16 - [Ben T., Liara T'Soni] [Shepard, Gwen T.]
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: 59 - Favs: 66 - Follows: 89 - Updated: 6/16 - Published: 3/31
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