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Galactic Conflicts: Tales of First Contact by TheDoctor1998 reviews
Humanity and its allies have stood strong after the Great War with the Covenant. Follow the Systems Alliance as it goes through a first contact nearly as disastrous as the one that lead to the Great War.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 18,922 - Reviews: 63 - Favs: 179 - Follows: 255 - Updated: 11/5 - Published: 2/6
Descent of the Angels by IReadToLive99 reviews
From a war-torn galaxy to another at the edge of extinction. The Blood Angels, through mysterious providence, are here now. Absent of the guidance of the Primarch and the Emperor, duty and devotion will lead them on a path to safeguard humanity from the darkness that lurks amongst the stars.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 11,849 - Reviews: 34 - Favs: 180 - Follows: 273 - Updated: 11/5 - Published: 5/25 - Space Marines, Shepard
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: 66 - Words: 289,833 - Reviews: 259 - Favs: 382 - Follows: 501 - Updated: 11/5 - Published: 8/7/2022
Effect of a Titanfall by MidnightFenrir reviews
When you die, you expect things to happen, from the void to eternal happiness. But if given the choice to live again, wouldn't you take it? I did. Since then, it's been one crazy thing after the other, the latest of which was to end up in yet another universe. But what can you expect when the manifestations of Luck and Fate themselves tell you it's going to be an adventure? OC/SI.
Crossover - Mass Effect & Titanfall - Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 62,206 - Reviews: 340 - Favs: 1,847 - Follows: 2,397 - Updated: 11/4 - Published: 12/17/2016 - Kasumi G., Shepard, OC, BT-7274
Mass Effect: Fear the Old Blood by thelordofdarkreunion reviews
Shepard died, choking in the darkness of space. But yet she awoke, finding herself within a strange Hunter's Dream. Meeting the mysterious Good Hunter and Plain Doll, there are many lessons to be learned from both her home galaxy and a strange world of luminous moons and terrible beasts. Yet through them both, one rule remains constant: Fear the Old Blood.
Crossover - Mass Effect & Bloodborne - Rated: T - English - Adventure/Supernatural - Chapters: 4 - Words: 22,572 - Reviews: 45 - Favs: 144 - Follows: 204 - Updated: 11/2 - Published: 10/12 - Shepard, The Hunter, Plain Doll
Petroleum Effect by PetroleumHead reviews
A dark alternative Mass Effect universe with a little bit of XCOM and a little bit of Cthulhu Mythos, along with some short-lived Care Bears. If humanity discovers that, in the right circumstances, petroleum can be used as a superior alternative to element zero, just how far will Earth's increasingly post-human, xenophobic, authoritarian government go to obtain oil?
Crossover - Care Bears & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 13 - Words: 42,515 - Reviews: 23 - Favs: 31 - Follows: 33 - Updated: 11/1 - Published: 9/16
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: 61 - Words: 221,329 - Reviews: 628 - Favs: 888 - Follows: 955 - Updated: 11/1 - Published: 4/14/2015
Effecting Fate by shdowstep reviews
Shiro Emiya: Engineer, Colonist, and Survivor. Arturia Pendragon: Vanguard, Spacer, and War Hero. "It has been said that the Once and Future King would return when she was most needed. With the threat as large as the Reapers? Well, that would certainly qualify as such a time. And who better to accompany a sword than it's sheath?"
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Romance/Adventure - Chapters: 8 - Words: 87,711 - Reviews: 377 - Favs: 1,500 - Follows: 2,067 - Updated: 10/31 - Published: 12/13/2019 - [Arturia Pendragon, Shirō E.]
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.
Crossover - Naruto & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 25 - Words: 86,410 - Reviews: 180 - Favs: 302 - Follows: 422 - Updated: 10/31 - Published: 1/14
Not in one's own plate by Sicht reviews
Time has become an elusive concept, leaving V uncertain if she has been trapped for a year or even longer. Amidst lingering anxiety and worries, she clings to the belief that her sacrifices were not in vain, desperately seeking a glimmer of hope for a meaningful outcome to her plight. Since hope dies last.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Sci-Fi - Chapters: 11 - Words: 52,944 - Reviews: 15 - Favs: 77 - Follows: 133 - Updated: 10/31 - Published: 9/8/2022 - V, OC, Viktor V., Johnny Silverhand
No place like home by Sicht
They promised, 'The Future is with us' and, I wondered who 'us' really was. The average Ivan and Natasha were nowhere in sight for whatever plans the leaders of the Union had in mind. Still, I don't think it was all smoke and mirrors. Might need to see for myself, just to make sure.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Sci-Fi - Chapters: 2 - Words: 11,080 - Favs: 3 - Follows: 6 - Updated: 10/31 - Published: 8/2
The Sins of our Fathers by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 10 - Words: 97,151 - Reviews: 436 - Favs: 1,237 - Follows: 1,689 - Updated: 10/30 - Published: 2/11 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
Buzzard Buccaneer Radio by General Rage reviews
Boz the Buzzard hosts this pirate radio station, beaming out music to the Normandy, Fallen Serpent, Crusty Chorka and Ascendant Justice non-stop. BBR has only one mission, to keep Rock n Roll alive in the dark void of outer space. A companion story to "Remnants" that shows what happens while Shepard is off playing hero. Part of the Wormhole Chronicles Saga.
Crossover - Halo & Mass Effect - Rated: M - English - Humor/Sci-Fi - Chapters: 11 - Words: 84,796 - Reviews: 98 - Favs: 97 - Follows: 111 - Updated: 10/29 - Published: 9/21/2016 - OC
The Effect of a Horse and a Dragon by Vimesenthusiast reviews
A different decision right after being cursed leads to a very different Ranma showing up in Nerima. When he goes after Herb to beat some sense into him Ryoga takes the chance to get rid of his rival once and for all, sending both combatants to the Mass Effect universe. What changes will two martial artists and their use of ki have on the coming conflict? RanmaXTaliXKasumiXSama
Crossover - Ranma & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 7 - Words: 140,070 - Reviews: 582 - Favs: 2,168 - Follows: 2,234 - Updated: 10/29 - Published: 2/2/2014 - Ranma, Kasumi G., Tali'Zorah, Samara
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 41 - Words: 863,235 - Reviews: 827 - Favs: 481 - Follows: 554 - Updated: 10/28 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
Boundaries Displaced by Hirowolfgang reviews
When a dormant Mass Effect is activated by Battarian pirates, it is affected by a mysterious phenomenon that displaces the Dreikruz en route to their final confrontation with the Quaestors. Now stranded Mitsuba and the Dreikruz have to put differences aside in order to work together with the Normandy SR-2 against the Collectors and the following Reaper war. For better or worse.
Crossover - Mass Effect & Super Robot Wars - Rated: M - English - Sci-Fi/Drama - Chapters: 8 - Words: 38,413 - Reviews: 15 - Favs: 32 - Follows: 48 - Updated: 10/26 - Published: 2/28 - Garrus V., 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: 81 - Words: 321,323 - Reviews: 818 - Favs: 815 - Follows: 1,090 - Updated: 10/26 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness
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: 27 - Words: 122,765 - Reviews: 7 - Favs: 21 - Follows: 26 - Updated: 10/26 - Published: 6/15/2021
Halo: Wormholes by TimeTraveller-1900 reviews
In this series of one-shots which is set in an alternative universe where the human race discovers how wormholes work. Suddenly human explorers and expeditions are travelling from one planet to another, from one solar system to the next, without spaceships. How will humanity cope with enemies within? How will they cope with the Citadel? More importantly, what about the Covenant?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,895 - Reviews: 1 - Favs: 27 - Follows: 35 - Published: 10/25 - Master Chief/John-117, C. Halsey, Kelly-087, Admiral Hackett
New era by martinantab reviews
THIS STORY IS PAUSED, I SHOULD CONTINUE I. FUTURE OR I WILL COMPLETELY REWRITE THIS STORY, DUE TO GRAMMAR ISSUES AND I THINK I RUSHED IT. BUT THANKS FOR THE REVIEWS, IT HELPED ME A LOT. I WILL PROPABLY REWRITE THE STORY AGAIN.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 4 - Words: 8,625 - Reviews: 12 - Favs: 41 - Follows: 58 - Updated: 10/25 - Published: 10/6 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
The Dream Effect by DarkPhoenixLady reviews
A rewrite of the original dream effect. Set hundreds of years after the Deep Dream series. Humanity has been slowly expanding across space, and has just encountered the citadel races. After a rocky start, the two groups start to co-exist. Then someone attacks Eden Prime and tries to remove the prothean beacon.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 24 - Words: 113,781 - Reviews: 9 - Favs: 49 - Follows: 73 - Updated: 10/24 - Published: 5/9 - Liara T'Soni, Tali'Zorah, Shepard
Humanity Perpetuum by Slim Dustpan reviews
My earliest work, now fully updated! (wow). Within is a tale of a collision of the absurd and rather horrifying world of Red alert and the rich world of the Citadel council, a clash of cultures and species with colourful characters and large scale intergalactic war. Filled with all varieties of Battle; Space Battles, Ground battles, Diplomatic Battles, and (possibly) many more!
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 5 - Words: 13,491 - Reviews: 18 - Favs: 50 - Follows: 78 - Updated: 10/24 - Published: 4/17/2018
Frontlines: the Attican Front by vmoneywashere reviews
For over half a decade, the Citadel is losing a war against the race simply nicknamed the Friskies (Lankies). Their worlds slowly being lost, armies even numbers in the hundreds of thousands wiped off the map, and millions dead. But hope can be found. A signal detected off in the Attician Traverse. A recon force ventures out: To find a duel between Humanity and the Lankies.
Crossover - Misc. Books & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,425 - Reviews: 16 - Favs: 98 - Follows: 153 - Updated: 10/24 - Published: 9/4
A Metal Guardian by JawsOnYou67 reviews
The Universal Century, only a few short years ago humanity nearly eradicated itself to the tune of a madman, now it spreads, free of most of its old hatred. Yet the galaxy won't let them rest. Terminal prepares the twin Queens as best it can. (Gundam x Mass Effect)
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 22 - Words: 108,339 - Reviews: 132 - Favs: 366 - Follows: 456 - Updated: 10/23 - Published: 8/18/2020 - Amuro R., Char A., Tali'Zorah, Admiral Hackett
The Final Horizon by Touhoufanatic reviews
Taking a different route of technology, humanity ascends to the stars upon Sails of light with hearts full of hope and adventure. the second Age of Exploration has truly begun, and nothing, not aliens, ancient space squids, or genocidal robots will stop humanity, and perhaps its greatest legend of the seas, from finding the Horizon once more! Rated T for now.
Crossover - Pirates of the Caribbean & Mass Effect - Rated: T - English - Adventure - Chapters: 5 - Words: 15,881 - Reviews: 63 - Favs: 327 - Follows: 457 - Updated: 10/20 - Published: 7/31/2022 - Capt. Jack Sparrow
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