Halo and Mass Effect Crossovers
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No Greater Calling by silencewillfall0091 reviews
Because here's the thing. Turians, despite their reputations, had never loved war- not the suffering, the dying, nor the pain. They loved victory- the prevailing of clear good over clear evil- justice winning in the end, the beating of overwhelming odds for peace. And there was never more a clear example of this type of war than ours against the Covenant.
Rated: T - English - Sci-Fi - Chapters: 4 - Words: 6,957 - Reviews: 97 - Favs: 418 - Follows: 655 - Updated: 12/4/2022 - Published: 1/7/2022
Mass Effect: Forward Unto Dawn by WildcatWarrior67 reviews
Spartans never die. They're just missing in action. At least, that's how the saying goes. But for the Master Chief and Cortana, they're no longer missing. Awaking in a different universe, the two of them will uphold their oath: to protect Earth and all her colonies. Only it won't be from the Covenant this time. And just who is this Commander Shepard they'll be working with?
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 3,522 - Reviews: 20 - Favs: 100 - Follows: 180 - Updated: 11/28/2022 - Published: 11/26/2022 - Master Chief/John-117, Shepard
Collectors at Dawn v2 by jacksld850 reviews
A rewrite of the original Collectors at Dawn. Lost all of the work I had on it so I'll be redoing it from scratch.
Rated: M - English - Adventure/Sci-Fi - Chapters: 1 - Words: 11,710 - Reviews: 4 - Favs: 35 - Follows: 62 - Published: 11/21/2022 - Master Chief/John-117, Cortana, Miranda L., Shepard
The Adventures of the Lucen: The VykurCorp Conspiracy by General Rage reviews
Liara T'Soni continued her mission to protect the Galaxy while Commander Shepard is in another dimension. She must stop the Covenant and the allies they've gathered from wreaking havoc in a Galaxy without it's greatest hero. While she's had some success, there's a gathering storm on the horizon and one of her crew of misfits will be forced to confront her past before it clears.
Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 249,270 - Reviews: 175 - Favs: 132 - Follows: 140 - Updated: 11/17/2022 - Published: 6/26/2016 - OC, Liara T'Soni, U. Wrex
Were it So Easy by Sigma0327 reviews
Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?
Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 98,545 - Reviews: 165 - Favs: 785 - Follows: 1,115 - Updated: 11/11/2022 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
Mass Emile by Ranschaj reviews
Emile survives the two zealots at the end of Reach, and after surviving Covenant onslaught, finds himself in the ME universe. Kick-ass picture is thanks to freejimmy on deviantart
Rated: M - English - Adventure/Sci-Fi - Chapters: 11 - Words: 88,211 - Reviews: 881 - Favs: 1,149 - Follows: 1,399 - Updated: 10/30/2022 - Published: 12/11/2012 - Emile-A239/Noble Four
Daily war with monster girls by Masterdude21 reviews
With the help of the highly-motivated extra-species in the military, mankind holds their own against the brutal onslaught of the Covenant. In their haste to close the gap in space warfare, ONI stumbles upon Relay 314. Even as new enemies arise, the galaxy constantly thwarts Cortana's schemes to build the Master Chief the ultimate harem. Halo/Mass Effect/Monster Musume crossover.
Rated: M - English - Humor/Romance - Chapters: 28 - Words: 383,980 - Reviews: 1082 - Favs: 2,117 - Follows: 2,386 - Updated: 10/28/2022 - Published: 9/20/2016 - Master Chief/John-117, Cortana, Shepard
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 (abandoned)
Rated: M - English - Sci-Fi - Chapters: 29 - Words: 84,554 - Reviews: 533 - Favs: 1,125 - Follows: 1,557 - Updated: 10/5/2022 - Published: 6/18/2020
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.
Rated: M - English - Adventure/Sci-Fi - Chapters: 35 - Words: 764,095 - Reviews: 754 - Favs: 445 - Follows: 508 - Updated: 8/28/2022 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
The Might of Humanity by The Grandiose Library reviews
In Progress
Rated: M - English - Adventure/Sci-Fi - Chapters: 1 - Words: 6,741 - Reviews: 15 - Favs: 97 - Follows: 114 - Published: 8/16/2022
Mass Effect Terran Effect by The Grandiose Library reviews
Work In Progress
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 695 - Reviews: 3 - Favs: 29 - Follows: 38 - Published: 8/16/2022
Predating Prelates by Lighting wolf knight reviews
The one ship that ends up here and it changes so much... Rated T for violence, death, and profanity.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 827 - Reviews: 3 - Favs: 7 - Follows: 12 - Published: 8/2/2022 - OC, Shepard, Peebee S.
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.
Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 127,353 - Reviews: 368 - Favs: 784 - Follows: 1,024 - Updated: 7/4/2022 - Published: 7/28/2020
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".
Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 73,718 - Reviews: 40 - Favs: 97 - Follows: 123 - Updated: 7/4/2022 - Published: 4/30/2022 - 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.
Rated: M - English - Sci-Fi - Chapters: 24 - Words: 82,670 - Reviews: 324 - Favs: 753 - Follows: 936 - Updated: 7/4/2022 - 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.
Rated: M - English - Sci-Fi - Chapters: 1 - Words: 11,385 - Reviews: 12 - Favs: 94 - Follows: 132 - Published: 7/2/2022 - SPARTAN-B312/Noble Six, OC, Admiral Hackett, Shepard
Heroes UNITE! by So-Pro Warrior reviews
Commander Shepard and his team have gathered together the races of their Galaxy in an effort to defeat the Reapers. But is it enough? When the team comes across a strange woman they find out that if they are to truly defeat the Reapers once and for all. They will need all the help they can get. But not from their Universe. Multiverse Crossover! Chapters 6-22 Being Rewritten!
Rated: T - English - Adventure/Sci-Fi - Chapters: 49 - Words: 1,514,387 - Reviews: 901 - Favs: 429 - Follows: 406 - Updated: 6/14/2022 - Published: 6/21/2013 - Master Chief/John-117, Shepard - Complete
The Great Galactic War by hellothere45 reviews
Occurs after the events of Halo Infinite. Cortina finds out about a new enemy from the void of space called the reapers who are trying to rule the galaxy sending a warning to her former allies and enemies to unite the, she assigns chief espranza and the Weapon on a mission to unite the Citadel species to fight a war to end all wars in the Galaxy, can they do this task
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,068 - Reviews: 17 - Favs: 28 - Follows: 39 - Updated: 6/9/2022 - Published: 6/3/2022
Rise of Humanity by James118 reviews
Soon after the war with the Covenant, humanity discovers a Mass Relay that opens the door to the rest of the galaxy. But it also awakens the greatest threat humanity has ever faced. Male Shepard/Liara. OC/Krystal (from Star Fox).
Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 22,101 - Reviews: 21 - Favs: 106 - Follows: 150 - Updated: 5/31/2022 - Published: 5/21/2022 - [Shepard, Liara T'Soni] OC
Spirit of Fire by GoldenThorns-Fiverr reviews
A Crossover fanfic I did as a Fiverr request.
Rated: T - English - Chapters: 1 - Words: 7,853 - Reviews: 3 - Favs: 10 - Follows: 11 - Published: 5/24/2022 - Complete
Mass Effect - Orion (Discontinued) by Fallen2Pancake reviews
This is a Mass Effect - Halo - XCOM Crossover. In the year 2084 during the Asteroid Belt Offensive XCOM Elite Unit Strike-1 discovers an Ethereal Station but must Psionic Teleport away but something goes wrong. In the Year 2552 the UNSC Fearless an Orion-Class Assault Carrier is forced to escape Reach under heavy fire, during the Slipsapce Transit something goes wrong.
Rated: M - English - Sci-Fi - Chapters: 8 - Words: 61,867 - Reviews: 69 - Favs: 170 - Follows: 245 - Updated: 5/13/2022 - Published: 4/16/2022 - SPARTAN-B312/Noble Six, Rookie, D. Anderson, Shepard
War and peace by Curiously intrigued reviews
The reapers brings new galactic superpowers into the war after invading the Orion arm of the galaxy. will the conflict unite them against a common foe or will they open conflict with each other.
Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 2,510 - Reviews: 12 - Favs: 50 - Follows: 91 - Updated: 5/11/2022 - Published: 5/5/2022
Mass Effect: ODST Lost by Stardew's Stardrop 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.
Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 15,072 - Reviews: 20 - Favs: 97 - Follows: 148 - Updated: 5/11/2022 - Published: 4/24/2022 - OC, Ashley W., Tali'Zorah, Shepard
The Way the World Ends by Canelo312 reviews
AU. Spartans never die. But we all know that's not true. A terrifying new enemy approaches and only time will tell if the forces that be can stop them.
Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 25,002 - Reviews: 7 - Favs: 51 - Follows: 75 - Published: 5/7/2022 - Master Chief/John-117, SPARTAN-B312/Noble Six, Liara T'Soni, Shepard
Halo: A New Journey by mgarner3199 reviews
Master Chief wakes up in the Mass Effect universe and joins Commander Shepard in an effort to stop the Reapers. With time running out, can they stop the extinction of every species, or will they fade into legend?First, they got to stop the Reapers though...
Rated: K - English - Sci-Fi/Romance - Chapters: 3 - Words: 3,002 - Reviews: 15 - Favs: 37 - Follows: 73 - Updated: 4/27/2022 - Published: 12/7/2021 - Cortana, Master Chief/John-117, Illusive Man, Shepard
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