2k+ The Mission Stays the Same » by Broken Trident A joke of Chaos daemon sent two unlikely allies - an Eldar Farseer and an Imperial Storm trooper, through the Warp and into another Universe. In this place, everything is alien to them. Except for one thing - war. War is something they know very well. (Story adopted by Regina Dea. New author starts from Chapter 21)
Warhammer & Mass Effect, M, English, Sci-Fi & Adventure, chapters: 31, words: 354k+, favs: 4k+, follows: 4k+, updated: 9/3 published: 10/4/2011, Eldar, Imperial Guard, Shepard
944Shattered Reflection » by Natzo In one world, Robin died abandoned by those she thought friends, with the sword of her lover driven into her chest. In another world, a young man with no memories of his past was trusted to guide Ylisse in war. Given a new chance, the broken queen will make sure this young tactician survived, no matter the cost.
Fire Emblem, T, English, Adventure & Hurt/Comfort, chapters: 28, words: 327k+, favs: 1k+, follows: 1k+, updated: 8/13 published: 10/23/2015, Avatar/Robin
699 Remnants » by General Rage 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.
Halo & Mass Effect, M, English, Adventure & Sci-Fi, chapters: 33, words: 729k+, favs: 400, follows: 446, updated: 7/21 published: 4/22/2016, Master Chief/John-117, Cortana, Tali'Zorah, Shepard
682 Avatar of Victory » by James Golen The Cycle of the Avatar has held for thousands of years. Other Cycles can stretch far, far longer. An A:tLA/Mass Effect Cross-Over
Avatar: Last Airbender & Mass Effect, T, English, Sci-Fi, chapters: 85, words: 1937k+, favs: 803, follows: 732, updated: 4/14 published: 5/8/2012
2k+ A Crack of Thunder » by Mr. Chaos Book 2 of A Song of Metal and Marvels. War grips Westeros. Tony and Jon protect the innocent, blind to the threats from the Iron Islands. Daenerys faces doom. Arya searches for the Brotherhood. Theon's destiny is changed. Tyrion struggles to maintain control. And the Others strength their power. But all will change when the gods return to Westeros, for they bring thunder with them.
Marvel & A song of Ice and Fire, T, English, Fantasy & Adventure, chapters: 54, words: 350k+, favs: 1k+, follows: 1k+, updated: 3/28/2020 published: 9/9/2017, T. Stark/ Iron man, Daenerys T./Dany, Jon S., Tyrion L.
143 The Adventures of the Lucen: The VykurCorp Conspiracy » by General Rage 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.
Halo & Mass Effect, M, English, Sci-Fi & Adventure, chapters: 12, words: 193k+, favs: 117, follows: 122, updated: 12/19/2019 published: 6/26/2016, OC, Liara T'Soni, U. Wrex
1k+ The Silent Kingdom » by Freedan the Eternal One year after the death of Ganondorf, Link finds everything he cares for torn from him once again. In the company of Midna and Princess Zelda, he must travel to a faraway land to find an ancient magic power to save not only Hyrule, but the world...
Legend of Zelda, T, English, Adventure & Romance, chapters: 154, words: 1099k+, favs: 1k+, follows: 1k+, updated: 7/26/2019 published: 1/30/2007, Link, Midna
199Future's End » by metallover AU, OC. Five years after the defeat of the Fell Dragon Grima the world has returned to some semblance of peace, and in this new age Robin trains students to be multi-faceted tacticians like himself. However Grima's taint is not yet gone from this world, as he and his students discover when man's grasp exceeds his reach and Robin is forced back into battle alongside the Shepherds.
Fire Emblem, T, English, Adventure & Fantasy, chapters: 28, words: 267k+, favs: 256, follows: 306, updated: 1/2/2019 published: 11/15/2015, [Avatar/Robin, Lucina] OC
3k+ The Last Spartan » by DinoJake 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.
Halo & Mass Effect, T, English, Sci-Fi & Adventure, chapters: 55, words: 489k+, favs: 4k+, follows: 4k+, updated: 12/31/2018 published: 5/2/2010, Master Chief/John-117
1k+ A Spartan in Westeros (A Song of Ice and Fire X Halo Crossover) » by Agailius When the Forward Unto Dawn lands in the North, it sets the stage for untold repercussions which will ripple throughout the whole of Westeros. With civil war threatening to tear the land apart, and an entirely more dire threat arising beyond the Wall, John and Cortana take it upon themselves to again protect the whole of mankind; from both it's own demons... and those beyond.
Halo & A song of Ice and Fire, M, English, Sci-Fi & Fantasy, chapters: 21, words: 128k+, favs: 3k+, follows: 4k+, updated: 10/1/2018 published: 6/3/2014, Master Chief/John-117, Cortana, Jon S., Eddard S./Ned
1k+ A Man of Iron » by Mr. Chaos Antony 'Tony' Stark is the arrogant cousin of Ned who made his fortune crafting weapons for the lords of Westeros. He leads a joyful life, doing what he pleases and leaves the politics to others. But when violent attack nearly ends his life, Tony decides to take action and creates a hero for the people to rally around: a knight known as Iron Man. Book 1 of A Song Metal and Marvels
Ironman & A song of Ice and Fire, T, English, Fantasy & Adventure, chapters: 33, words: 139k+, favs: 2k+, follows: 2k+, updated: 9/7/2017 published: 3/2/2014, V. Potts/Pepper, J. R. Rhodes/Rhodey, A. E. Stark/Tony, Jon S.
446 A Song of Dusk and Dawn » by metallover AU. A sheltered prince is thrown into a world on the cusp of war, torn between the family that birthed him and the family that raised him. What repercussions will his choices have on the world? Will he choose the path of his birthright? Or will he choose the path of conquest? Can he rise to lead the world to peace? An expanded prologue for the fourteenth game in the series, Fates.
Fire Emblem, T, English, Adventure & Fantasy, chapters: 12, words: 101k+, favs: 280, follows: 307, updated: 8/10/2017 published: 3/8/2016, Avatar/Corrin
668 Strange Places » by Ayu Ohseki [Spoilers For Entire Game] "If we're really friends, you won't come back." After sparing the final boss and facing the consequences for their actions up 'til then, the fallen child takes those words to heart and resets. The next time will be better, but a question still lingers: what does it mean to be "friends"? If they keep going, maybe they'll learn the answer...
Undertale, T, English, Friendship & Drama, chapters: 42, words: 211k+, favs: 1k+, follows: 1k+, updated: 10/8/2016 published: 11/8/2015, Frisk, Sans, Chara, Flowey
161 A Hero's Welcome to Valoran » by Knight in Blackest Armor A small flotilla of vessels commanded by the venerable Grand Admiral Kunkka was sent to investigate and try to deal with the anomalous activities occurring in a neighboring set of islands. Little did the grand admiral know that this very important assignment will place him and his Radiant comrades into world-changing positions in Valoran. Updates intermittently.
League of Legends & Dota 2, T, English, Fantasy & Humor, chapters: 18, words: 170k+, favs: 114, follows: 145, updated: 5/5/2016 published: 6/8/2014, Jarvan IV, Kunkka, Lycan
1k+ Invisible Ties » by metallover AU. When Robin wakes in the middle of a field with no memory of his past nothing could prepare him for the adventure that awaits. With the Prince of the kingdom of Ylisse Chrom and his faithful band of Shepherds, Robin rises from a humble tactician to one of the saviours of the world. A loose (very loose) adaptation of Nintendo's thirteenth Fire Emblem game - Awakening.
Fire Emblem, T, English, Adventure & Fantasy, chapters: 67, words: 668k+, favs: 1k+, follows: 1k+, updated: 11/14/2015 published: 8/27/2013, [Avatar/Robin, Lucina] Chrom, Morgan
1k+ Guilty Sparks » by General Rage Fleeing from the glassing of Reach in the belly of the Pillar of the Autumn, the crew of the SR-2 Normandy find themselves stranded with their UNSC allies on a strange Forerunner constructed ring world called Halo with the Covenant hunting them. But Halo holds a secret, one deadlier than both the Covenant and Reapers combined... and it's hungry.
Halo & Mass Effect, M, English, Sci-Fi & Horror, chapters: 38, words: 890k+, favs: 718, follows: 616, updated: 1/28/2015 published: 11/5/2012, Master Chief/John-117, Shepard
2k+ The Spirit of Redemption » by Myetel The Spectres fight against threats to both the galaxy and their families on Mindoir. Shepard/Garrus, multiple OCs, largely expanded universe. Includes Redemption, Hunt, Unity, and Victory.
Mass Effect, M, English, Adventure & Sci-Fi, chapters: 162, words: 3404k+, favs: 886, follows: 501, updated: 10/14/2014 published: 2/11/2011, Garrus V., J. Garson
619 When There Was a Tomorrow » by General Rage Do you remember when there was a tommorow? Commander Wade Shepard does, but with a Reaper threat looming he's not sure there is one anymore. And he's about to discover that his universe may not be the only one where mankind faces extinction. M for B&V
Halo & Mass Effect, M, English, Sci-Fi & Adventure, chapters: 25, words: 630k+, favs: 958, follows: 686, updated: 7/31/2012 published: 4/13/2011, SPARTAN-B312/Noble Six, Shepard