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The Attack on Reach by De4thknight reviews
The Empire has found Reach and has started to declare war against the UNSC but not just them they will be fighting, they also found a Halo ring and the Covenant army, fighting all three fronts but it won't be long before they bring thee Deathstar into the
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 13,495 - Reviews: 5 - Follows: 2 - Updated: 4h - Published: 7/28 - Darth Vader, Master Chief/John-117, Arbiter
Shadow Contingency by Andrithir reviews
To safeguard the UEG and its secrets, Task Forces with plausible deniability must be created in order to identify and neutralise threats posed by foreign and domestic powers. -Shadow Contingency Abstract
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 30,648 - Reviews: 23 - Favs: 74 - Follows: 97 - Updated: 7h - Published: 7/15 - Master Chief/John-117, Shepard (F)
Falling Skies Mk II by Mediam Noctem reviews
In a future where Humanity is in a constant state of war within and without, heroes constantly arise… and fall. Tens of Billions dead. Hundreds of planets forever tainted by genocidal aliens. Old hatreds arise out of the ashes with the intent of achieving vengeance and at the cost of many. In a future where there is no hope, how will humanity move forward?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 3 - Words: 18,119 - Reviews: 32 - Favs: 37 - Follows: 49 - Updated: 17h - Published: 7/17 - Shepard (F)
Never Forget by de4deye117 reviews
A rookie SPARTAN-lV surveyor is assigned by the UNSC and ONI to personally lead an investigation behind the bizarre disappearance and fabled history of a unspoken hero among a world of Pokémon from years ago. His discoveries will lead him to things that only few can even comprehend. (Sequel to Unforgotten)
Crossover - Pokémon & Halo - Rated: K+ - English - Sci-Fi/Mystery - Chapters: 34 - Words: 214,762 - Reviews: 53 - Favs: 10 - Follows: 12 - Updated: 21h - Published: 4/14 - Ash K./Satoshi, Arceus, M. Parangosky, OC
Kirito meets the Covenent by Juancabrillio
What happens when kirito and his friends are thrust into the middle of the covenant war? I'm sorry I'm terrible at summarys and this is my first fan fiction hope you enjoy.
Crossover - Halo & Sword Art Online/ソードアート・オンライン - Rated: K+ - English - Adventure - Chapters: 2 - Words: 1,676 - Updated: 23h - Published: 7/28
The Infinity Effect by creamofwheat2311 reviews
After discovering a Precursor artifact, the UNSC Infinity and the Sangheili Shadow of Intent are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined: the Reapers. Alliances are founded, friendships are formed, and decisions are made that will change this galaxy forever. Post Halo 4, Pre ME3. AU
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 205,177 - Reviews: 1728 - Favs: 1,865 - Follows: 2,337 - Updated: 23h - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
Planet Remnant by Sillva reviews
Ruby Rose is a Captain of a deep space scavenging team from a long thought destroyed planet on the outskirts of UNSC territory Known as Remnant. While responding to a UNSC distress beacon Ruby and her crew find way more than they barged for. Will it prove to be their undoing or perhaps have they found the key to their planets survival?
Crossover - Halo & RWBY - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 2 - Words: 5,961 - Reviews: 2 - Favs: 5 - Follows: 4 - Updated: 8/3 - Published: 7/29
Master chief in sky rim by DDAN1157 reviews
After drifting in space for four months master chief and Cortona find themselves on a strange planet.
Crossover - Halo & Elder Scroll series - Rated: T - English - Friendship/Adventure - Chapters: 1 - Words: 2,246 - Reviews: 2 - Follows: 2 - Published: 8/2
Ghost Prototype IS by PainX65 reviews
Ghost died in battle against the Covenant to get his men out alive, dying in a explosion caused by him saving his men and becoming a human again he woke up on a beach alive with the prototype suit he used to fight the Covenant and who is this girl with fake rabbit ears? Getting used to this new place, learning about IS and been dragged around by this girl, will Ghost truly be human
Crossover - Halo & Infinite Stratos/IS<インフィニット・ストラトス> - Rated: T - English - Adventure - Chapters: 1 - Words: 3,047 - Reviews: 9 - Favs: 23 - Follows: 24 - Published: 8/2 - Chifuyu O., Tabane S.
Halo The Evolution Continues by UNSpaceCommand reviews
First time Crossover. Constructive Critic welcome. Enjoy and pls Review. Chapter 26 is up. A long lost ship is returning home but it seems fate have a decision to make a mess of things.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 26 - Words: 54,614 - Reviews: 306 - Favs: 380 - Follows: 435 - Updated: 8/2 - Published: 9/22/2011
RWBY and Burn Squad by HaloGoji75 reviews
Follow the adventures of Burn, Ruby, and the rest of the gang as they try to stop returning foes and new enemies from instilling universal anarchy. Will Burn Squad be able to save the day? Of course NOT! We're doomed. Volume 2: The Mole
Crossover - Halo & RWBY - Rated: T - English - Sci-Fi/Humor - Chapters: 5 - Words: 5,183 - Reviews: 5 - Favs: 5 - Follows: 6 - Updated: 8/2 - Published: 6/26 - OC, Penny, Team RWBY, Team JNPR
Love vs the Covenent by Agent York FTW reviews
Captain Rex and Ahsoka Tano are in love. But when a man comes to help distroy the covenent the love those two share is in danger. Will Rex and Ahsoka keep their love, or will the covenent distroy all hopes of their love continuing. Rexsoka parring also smaller parings Cody/Barriss, Anakin/Padme, master Chief/Cortana.
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Romance/Sci-Fi - Chapters: 6 - Words: 9,151 - Reviews: 3 - Favs: 6 - Follows: 6 - Updated: 8/2 - Published: 4/25 - [Master Chief/John-117, Cortana] [Ahsoka T., Captain Rex]
The Videogame Multiverse by Chaotic Dark Silver reviews
There is a great evil approaching, and it is up to a group of heroes to try to stop it. Leon, who doesn't get any jokes whatsoever. Blaze, the out-there one, who generally doesn't pay attention. Mizu, who can pull a frying pan out of nowhere, just so she can hit somebody. Drago, the main hero, who spends far too much time playing games. ...I think we are doomed.
Crossover - Super Smash Brothers & Halo - Rated: T - English - Humor/Adventure - Chapters: 18 - Words: 28,040 - Reviews: 5 - Favs: 4 - Follows: 3 - Updated: 8/2 - Published: 5/2
Different Galaxies Same Fighting Heart by BeeSamusnChief reviews
After loosing Cortana and gaining, his team back. Chief awakes from cryo on the Infinity, and is ordered to investigate an unkown alien planet, that the Covenant have been dsearching for some sort of weapon. When the weapon turns out to be a someone, Chief is put in a situation he has never been in through his entire legendary history. Can he survive the coming action?
Crossover - Metroid & Halo - Rated: T - English - Family/Humor - Chapters: 6 - Words: 56,522 - Reviews: 23 - Favs: 35 - Follows: 40 - Updated: 8/2 - Published: 9/30/2014 - Samus A., Master Chief/John-117
Rite of Reclamation by Glory-To-Our-August-King reviews
15 years after the fall of the Didact, humanity struggles to survive in the wake of the Onslaught: a ruthless attack launched by ancient constructs known as Watchers. In their conquests, they have awakened Adam and the Angels, who now stand poised to wrestle the Mantle from Earth's frail grasp, and bring about mankind's Final Judgment.
Crossover - Evangelion & Halo - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 57,870 - Reviews: 4 - Favs: 9 - Follows: 8 - Updated: 8/2 - Published: 5/19
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!
Crossover - Mass Effect & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 428,050 - Reviews: 88 - Favs: 69 - Follows: 65 - Updated: 8/2 - Published: 6/21/2013 - Master Chief/John-117, Shepard (M)
The Terran Variable by Pinoy Gamer reviews
Darth Sidious' plans to control the galaxy was in motion and even the Jedi Order has been fooled. Soon, the galaxy will bow to the new Emperor...that until the Force adds two variables he did not foresee: Anakin Skywalker...and the inheritors of the Mantel - the Reclaimers. [This story was reposted because it in a limbo of sorts]
Crossover - Star Wars & Halo - Rated: T - English - Chapters: 5 - Words: 25,188 - Reviews: 39 - Favs: 62 - Follows: 95 - Updated: 8/2 - Published: 5/6
The Halo Effect by Agentweapon-Proelium Tempus reviews
The discovery of a massive shield world and its contents put the UNSC into high alert. More alien artefacts are uncovered here, while vastly inferior to Forerunner, Covenant and Humanity technology, they still pose a threat since no First Contact scenario ever goes according to plan. With the help of the newly established AIS, will the UNSC be able to survive this new threat?
Crossover - Halo & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 9 - Words: 39,360 - Reviews: 133 - Favs: 258 - Follows: 387 - Updated: 8/1 - Published: 5/5 - Master Chief/John-117, OC, Shepard (F), Admiral Hackett
Halo: The Unexpected Quest by Dinosaur Soldier reviews
Master Chief and Arbiter took an unlikely mission in Middle-earth after the events of Halo 3.
Crossover - Halo & Hobbit - Rated: T - English - Adventure/Sci-Fi - Chapters: 20 - Words: 38,176 - Reviews: 14 - Favs: 22 - Follows: 18 - Updated: 8/1 - Published: 10/18/2014 - Master Chief/John-117, Arbiter, Cortana, Gandalf
Shadows of War by gwb99 reviews
As the Empire encroaches on UNSC space a secret task force of UNSC ships is sent to cause chaos in anyway possible, which for a small team of SPARTAN III's is second nature. But other darker forces are at work in the shadows. (Sequel to Fires Of War)
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 67,787 - Reviews: 39 - Favs: 26 - Follows: 30 - Updated: 7/31 - Published: 8/11/2014 - Darth Vader, Stormtroopers, Kurt-051, OC
Halo X by tank destoryer reviews
A super soldier from another universe travels to another unknown world soon Sonic and the heroes found themselves teaming up with an uneasy ally the Master Chief . But can the Master Chief makes a difference in this new world as he battles new enemies and saving the galaxy at the same time. Based on the anime series Sonic X and Halo series.
Crossover - Sonic the Hedgehog & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 57,198 - Reviews: 65 - Favs: 25 - Follows: 27 - Updated: 7/31 - Published: 5/1/2014 - Sonic, Christopher T., Master Chief/John-117, T. Lasky
A Feeling of Importance by LebendenToten reviews
Well, after reading quite a bit of fanfiction I decided that maybe it was finally time for me to try and crank out one of my own. This is going to be a self insert story of sorts that starts in the Halo universe then eventually transitions to Mass Effect. This is my first Fanfic so be nice :P and constructive criticism/suggestions welcome! Rated T mainly for language.(changed to T)
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Friendship - Chapters: 15 - Words: 25,844 - Reviews: 87 - Favs: 87 - Follows: 139 - Updated: 7/30 - Published: 11/6/2014 - Master Chief/John-117, C. Halsey, OC, Shepard (F)
ODST or Clone? by CAPTAIN JASE S-412 reviews
A clone trooper. Just another stick in a pile of milions. What if a clone ended up fighting in the Human-Covenant war as a highly-trained "ODST"? How would he affect the war? And what would happen to the people he "left behind"? Find out here and now! -/- Re-wright of UNSC Marine? Or Clone Trooper? -/- Rating may change to M.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 18,852 - Reviews: 21 - Favs: 45 - Follows: 54 - Updated: 7/30 - Published: 3/28 - [Captain Rex, Ahsoka T.] A. J. Johnson, T. Hood
Forward into darkness by Soar Vandergeid
After the events of Halo 4. The Master Chief has lost a precious comrade and has difficulty dealing with it. As he is thrown into an unknown environment, alone and deprived of his greatest assets, he is forced to reflect on his life and realizes how precious indeed what he has lost was. But darkness never stops spreading and he is of the few that can hope to fight back. Rated K .
Crossover - Halo & Game X-overs - Rated: K+ - English - Hurt/Comfort/Romance - Chapters: 1 - Words: 1,083 - Published: 7/30 - Master Chief/John-117
Halo Bydo wars by Nemese reviews
UNSC finds something worse that the Covenant and the Flood put togther
Crossover - Game X-overs & Halo - Rated: T - English - Sci-Fi/Horror - Chapters: 2 - Words: 1,123 - Reviews: 1 - Updated: 7/30 - Published: 7/28
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