Halo and Mass Effect Crossovers
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The Demon Effect by SSJG RAIDEN reviews
Noble Three, Five and Six. after surviving Reach are upgraded with forerunner augmentations, amour, weapons, given a new A.I and a new Ship before they fly through a portal only to be transported to an entirely new universe and arrive in 2176 CE where the Colony of Elysium is under attack by Batarian's. Halo x Mass Effect x Star wars fic
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 13,235 - Reviews: 8 - Favs: 36 - Follows: 46 - Updated: 1h - Published: 1/16 - Jorge-052/Noble Five, Jun-A266/Noble Three, SPARTAN-B312/Noble Six, Shepard (F)
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 Commander and his team come 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!
Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 509,562 - Reviews: 219 - Favs: 139 - Follows: 132 - Updated: 18h - Published: 6/21/2013 - Master Chief/John-117, Shepard (M)
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 a millennia of isolation.
Rated: M - English - Sci-Fi - Chapters: 13 - Words: 24,722 - Reviews: 93 - Favs: 193 - Follows: 278 - Updated: 1/15 - Published: 9/18/2016 - Master Chief/John-117, Cortana, Shepard (F), Tali'Zorah
Halo Mass Effect : Colonial War by tobiisagoodboy94 reviews
When a research ship finds a anomoly at the edge of Harvests system, a young militiaman and the whole UNSC are thrown into a galaxy much larger than they could have dreamed. Pre-war UNSC, with a mixture of Halo and Mass Effect characters and some OCs, all fighting for humanitys and maybe, if time and money is left over, the Citadels future.
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,768 - Reviews: 17 - Favs: 38 - Follows: 65 - Updated: 1/14 - Published: 1/11
A VERY BIG MASS EFFECT by cyrus saint 1st true god reviews
a remembrance day of the great war was under way when a slip- space portal drags the fleets of both parties in to the mass effect 3, the reapers are going to die a horrible death [in progress]
Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 11,003 - Reviews: 19 - Favs: 45 - Follows: 55 - Updated: 1/10 - Published: 10/7/2016 - Master Chief/John-117, P. Cole, T. Lasky, Shepard (M)
Fraught with Peril: A Halo Mass Effect Story by A-01 reviews
John was born for war, and even in the wake of defeating the Didact, there will be no respite. Thrust into the Mass Effect Universe he must either find his place or find his way home as his presence brings new hope to Shepard and his campaign against the approaching Reaper armada.
Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 18,257 - Reviews: 34 - Favs: 95 - Follows: 144 - Updated: 1/9 - Published: 12/16/2016
Reclamation: Genesis by DragonsManticoresAndGiantsOhMy reviews
Massively AU. Halo/Mass Effect merged continuity. The galaxy, like much of the universe, is in a constant cycle of birth, destruction and rebirth. No guarantee our civilization is any different. We know others have come before us and perished at their height. What destroyed them? Could it destroy us as well? One human might be our savior, but he needs to grow up a bit first.
Rated: M - English - Adventure/Sci-Fi - Chapters: 32 - Words: 470,142 - Reviews: 62 - Favs: 92 - Follows: 116 - Updated: 1/8 - Published: 7/14/2014 - Shepard (M)
Origins: Dark Rising by mcd3424 reviews
Once upon a time Humanity ruled the galaxy. We were the masters, the unchallenged, the undefeated, the invincible. But now we are nothing more than a shadow of our former power. Did we truly deserve this? Was all this war and destruction a monument to our sins? No, Humanity will not go silently into the night, we will survive and we will rise again, we will be stronger than before.
Rated: T - English - Tragedy/Sci-Fi - Chapters: 13 - Words: 55,893 - Reviews: 80 - Favs: 45 - Follows: 67 - Updated: 1/5 - Published: 11/7/2016 - P. Cole, OC, Liara T'Soni, D. Anderson
The Lone Wolf of the Normandy by SSJG RAIDEN reviews
The Spartan-III Commando Noble Six after surviving Reach runs through a forerunner Portal after receiving new Augmentations, Amour and Weapons and arrives on the Planet Eden Prime in 2183 CE when the Geth are invading the Planet where the scum of the Universe will learn why B-312 is ranked as a Hyper Lethal Vector.
Rated: M - English - Sci-Fi - Chapters: 10 - Words: 63,984 - Reviews: 138 - Favs: 218 - Follows: 289 - Updated: 1/2 - Published: 8/9/2016 - SPARTAN-B312/Noble Six, Shepard (F)
Book One: Dawn of a New Age by DragonheartODST reviews
Humanity had been expanding across the stars for over 5 centuries in relative peace. But an alien alliance known as the Covenant wishes to destroy humanity entirely. Now threatened with extinction, can the fate of just one battle-scared survivor change the events of the war and those participating in it? Multi-crossover with Halo, Mass Effect, and a little bit of StarCraft.
Rated: T - English - Adventure - Chapters: 9 - Words: 95,855 - Reviews: 136 - Favs: 149 - Follows: 175 - Updated: 1/1 - Published: 5/19/2016
The Avalon Federation Codex by DragonheartODST reviews
A full codex dedicated to the characters, cultures, places, objects, times, etc., related to the Concordian Cycle starting from Book One: Dawn of a New Age. Will be constantly updated alongside the books to fit with the details of the series. Please read the series first if you wish to gain a greater understanding.
Rated: T - English - Sci-Fi - Chapters: 3 - Words: 17,274 - Reviews: 10 - Favs: 11 - Follows: 12 - Updated: 1/1 - Published: 11/30/2016
The Last Spartan by DinoJake reviews
An AU fic in which the Halo and ME universes share the same galaxy. After a well deserved rest in Cryo-Sleep, Master Chief finally awakens...to a whole new galaxy.
Rated: T - English - Sci-Fi/Adventure - Chapters: 51 - Words: 461,909 - Reviews: 3438 - Favs: 3,109 - Follows: 3,158 - Updated: 1/1 - Published: 5/2/2010 - Master Chief/John-117
Mass Effect: The New Journey by Arashi the Solar Phoenix reviews
During a Joint Deployment, the UNSC Infinity and Her Sangheili allies are suddenly thrown into a new Galaxy, and end up near Charon before the Systems Alliance discovers the Charon Relay. Alliances are forged and how will the galaxy react to an aggressive humanity that not only doesn't use Mass Effect technology, but will not let anyone stand in their way of expansion? AU PreME1
Rated: T - English - Sci-Fi/Adventure - Chapters: 19 - Words: 190,515 - Reviews: 1232 - Favs: 1,885 - Follows: 2,326 - Updated: 12/31/2016 - Published: 1/26/2014
First Contact by Shadythief reviews
When the SSV Normandy becomes lost in space, they chance upon an undiscovered system. They find an unknown race, who use strange technology previously thought impossible. Could these aliens be the key to a far off future war? Or will they only cause more destruction?
Rated: K+ - English - Sci-Fi/Adventure - Chapters: 7 - Words: 30,619 - Reviews: 73 - Favs: 172 - Follows: 244 - Updated: 12/31/2016 - Published: 3/18/2016 - Arbiter, Shepard (F), Garrus V.
Halo New galaxy by Commander Kelec reviews
In 2554 the UNSC made contact with the Citadel races. But not everyone wants peace. Is cooperation between the UNSC and Citadel possible against the ex-Covenant splinter factions or will it turn into a three way war. ODST Lt Colonel John Shepard and Spartan Fireteam Crimson is right in the middle of it.
Rated: T - English - Sci-Fi/Adventure - Chapters: 13 - Words: 42,377 - Reviews: 30 - Favs: 44 - Follows: 64 - Updated: 12/31/2016 - Published: 11/21/2016 - Garrus V., U. Wrex, Shepard (M)
The Reclamation has already begun by Fade Maybe reviews
The Requiem Event has ended. The Reaper War is reaching its climax. In 2557 Military Calendar and 2186 Common Era, the UNSC is plunged in infighting and the Citadel Races are on the brink of annihilation. Light will be shed upon questions the Forerunners left behind. Ancient threats rise again. This is only the next step in the Reclamation, and it is too late to stop it.
Rated: T - English - Adventure/Sci-Fi - Chapters: 13 - Words: 130,401 - Reviews: 476 - Favs: 484 - Follows: 632 - Updated: 12/30/2016 - Published: 3/13/2013
The Spartan Effect by Gatekeeper333 reviews
Everyone's favorite Spartan is looking for a new purpose, lucky for him, the Commander his happy to oblige.
Rated: T - English - Chapters: 24 - Words: 219,535 - Reviews: 858 - Favs: 1,366 - Follows: 1,749 - Updated: 12/30/2016 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
The Unknown Defender by Gabenator5 reviews
Whilst Shepard is closing in on Saren, Rumors begin to spread among the Pirates and Slavers of the galaxy; rumors of a nameless fear... A creature... A Demon. Wreathed in Green Armor, it appears from nowhere and stops their Raids on Defenseless Colony Settlements; Slaughtering every Single Attacker... and then Vanishing Without a Trace... Who or What is this... Thing.
Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 74,464 - Reviews: 457 - Favs: 893 - Follows: 1,248 - Updated: 12/30/2016 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Shepard (F)
Mirrored Fates by long night of solace reviews
After the defeat of the didact, the galactic hero of the halo universe - Masterchief and his loyal blue team members embark on a strange new journey to an unknown universe in which later they come into contact with that universe's hero - Commander Shepard. Facing an unknown enemy, fighting a new war, its up to the heroes to save the day together.
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 125,064 - Reviews: 105 - Favs: 178 - Follows: 216 - Updated: 12/26/2016 - Published: 5/3/2016 - Master Chief/John-117, Cortana, Admiral Hackett, Shepard (M)
Catalog of War by hunter 139 reviews
A collection of one shots about events, including battles, conflicts and skrimishes, that occur in the shared multiverse of my stories. I do not own any of the franchises that appear in this series. Multicrossover.
Rated: T - English - Sci-Fi - Chapters: 9 - Words: 12,706 - Reviews: 7 - Favs: 7 - Follows: 7 - Updated: 12/25/2016 - Published: 4/21/2015
Halo-Mass Effect: Salvation's Light by Azores reviews
Every Great Journey begins with a single step. Every great story has a beginning. Witness the beginning to the Halo-Mass Effect Trilogy with Halo-Mass Effect: Salvation's Light. (2 chapter, Halo-centric Prologue; Slight Alternate-Universe)
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 7,041 - Reviews: 8 - Favs: 44 - Follows: 55 - Published: 12/24/2016 - J. Cutter, OC, Warden Eternal, Atriox
Hades Effect:Spartans of the Normandy by Johnnieboy11 reviews
In the year 2549, an ONI Spartan-III Team, known as Team HADES, goes missing with their ship, the UNSC Diamond in the Rough whilst on a mission to destroy a Covenant Staging ground. What neither they, nor the UNSC know is that the Spartans had been sent to a world beyond their own, a galaxy similar to theirs, but far more different... With a darker threat looming...
Rated: M - English - Sci-Fi/Romance - Chapters: 2 - Words: 7,351 - Reviews: 4 - Favs: 11 - Follows: 20 - Updated: 12/23/2016 - Published: 12/19/2016 - OC, Shepard (F)
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: 9 - Words: 190,162 - Reviews: 182 - Favs: 163 - Follows: 193 - Updated: 12/21/2016 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard (M)
The Strange Ship by regularmother reviews
In a hunt for raw materials for their people, Quarian explorers open a new mass relay. What awaits them on the other side is nothing they could have ever expected. Pre-Mass Effect 1, Post-Halo 4; AU only where necessary to mash two universes together and create something resembling a coherent storyline.
Rated: M - English - Sci-Fi - Chapters: 6 - Words: 23,577 - Reviews: 123 - Favs: 349 - Follows: 537 - Updated: 12/21/2016 - Published: 10/25/2016
Effects of a Titan by greeneman42 reviews
A small salvage ship comes across an interesting find while searching. Set before Halo 4 and before ME 2
Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 149,415 - Reviews: 583 - Favs: 922 - Follows: 1,269 - Updated: 12/20/2016 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
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