173 Only War: the Gate Crusade » by Deadi1025 The Saderan Empire created the Gate and expected to find an easy world to conquer from the other side. Little did they know of the monsters they have foolishly awakened and unleashed. It was on the peak of Alnus that everything began. It is on the peak of Alnus that everything will end.
Warhammer & Gate - Jietai Kare no Chi nite, Kaku Tatakeri, M, English, Adventure & Sci-Fi, chapters: 7, words: 66k+, favs: 338, follows: 433, updated: 1/14 published: 1/7/2019, OC, Lelei, Rory
32 The Siege of Titans » by E E Merica During the Great Crusade, the 86th Great Company of the Iron Warriors anticipates a routine compliance in a far flung corner of the galaxy, only to encounter massive walls full of horrific mutants and human soldiers who fight and die to stave off the encroachment of these mutants. The siege of Wall Rose will end in the smell of cordite and the sound of falling rubble.
Warhammer & Attack on Titan/進撃の巨人, M, English, Sci-Fi & Adventure, chapters: 5, words: 15k+, favs: 49, follows: 72, updated: 12/28/2020 published: 11/30/2020, Space Marines, Eren Y., Mikasa A., Historia R.
3k+ To Infinity » by creamofwheat2311 After discovering an ancient artifact, the UNSC's most advanced warship and a Sangheili Assault Carrier are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined.
Halo & Mass Effect, T, English, Sci-Fi & Adventure, chapters: 52, words: 454k+, favs: 4k+, follows: 5k+, updated: 12/20/2020 published: 10/9/2013, Master Chief/John-117, Arbiter, T. Lasky, Shepard
65 The Burning Crusade » by Northwoods Dude In the near future of the 22nd century we are now experiencing the golden age. Since the arrival of the Imperator Sucundus. We have spread across the stars and prospered. However in the year 2157, we have encountered a new threat. A species of xenos known only as "Turians" and "The Council" have been encountered. The Fleets are mobilized. And now, from the peace there is only war.
Warhammer & Mass Effect, T, English, Sci-Fi & Adventure, chapters: 5, words: 13k+, favs: 227, follows: 300, updated: 12/5/2020 published: 9/21/2018, Primarch/s, Illusive Man, Primarch Adrien Victus, Shepard
33 What Do You Mean By, Dragonborn? » by Eternal War Beholden to foretold lore, in times of unrest, that the folds of time and heavens would split, and from them rides a world breaker, clad in black scale and draped in fire. It would be here, in the lands of Skyrim He appears, and from there His grasp would encroach all of Tamriel.
Warhammer & Elder Scroll series, M, English, Adventure & Fantasy, chapters: 9, words: 33k+, favs: 56, follows: 83, updated: 12/4/2020 published: 8/3/2018, OC
129 Fallout: New World » by ComeInMeBro The man who had cheated death in the cemetery outside of Goodsprings, finds his mind muddled and his companion missing after awakening in a forest. With his gear and weapons accounted for, he begins his adventure in this strange New World. Little does he know, he isn't the only one bewildered by his new surroundings. Neutral Courier.
Fallout & Overlord/オーバーロード, M, English, Adventure & Friendship, chapters: 9, words: 113k+, favs: 359, follows: 458, updated: 11/26/2020 published: 11/5/2019, Courier, Ainz
330 Sins of a Galactic Empire Reborn » by zzzxxc1 When the Milky Way is revealed to the universe at large by a derelict CIS warship, the UEG are forced to become members of the transgalactic community, but its existence is soon threatened by the decline of the Republic, and the rise of an Empire. Adopted from SpaceCowboy2013.
Star Wars & Halo, T, English, Sci-Fi, chapters: 9, words: 65k+, favs: 852, follows: 1k+, updated: 11/10/2020 published: 7/28/2018, Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
425 GATE: Of Dragons and a Spirit of Fire » by Pkd Few years after the events of Halo Wars, the UNSC Spirit of Fire finds themselves above the orbit of a unknown world without any clue to where they are and what brought them here. Faced with a new obstacle the crew of the Spirit of Fire descends upon the world where they meet new allies and enemies, along with an relic of the past, as they try to find a way back home.
Halo & Gate - Jietai Kare no Chi nite, Kaku Tatakeri, T, English, Adventure & Fantasy, chapters: 24, words: 53k+, favs: 1k+, follows: 1k+, updated: 8/28/2020 published: 1/26/2018, J. Cutter, E. Anders, OC, Third Recon
154 Remnant's Emperor » by death korp commissinar After Dying the god-emperor of mankind finds himself in a whole new world, much different from the imperium he had left behind. Here he meets teenagers who fight demons with strange weaponry and strange customs. How will the fate of Remnant unfold now that the universe's most powerful man is upon it?
Warhammer & RWBY, M, English, Humor, chapters: 19, words: 66k+, favs: 217, follows: 243, updated: 8/9/2020 published: 4/17/2017, The Emperor, Primarch/s, Team RWBY
66 The Fate of Captain Sicarius » by Sealiman Dawntracker During the Indominus Crusade, Captain Cato Sicarius of the Ultramarines was deemed lost… This, however is what really happened… (Replaces Lords of the Chaos Ring)
Lord of the Rings & Warhammer, T, English, Adventure & Sci-Fi, chapters: 9, words: 13k+, favs: 85, follows: 135, updated: 8/7/2020 published: 9/3/2017, Frodo B., Gandalf, Aragorn, Space Marines
283 Imperium Effect: Terra Rising » by Deathwatch Razgriz The long awaited sequel to UNSC Pheonix Rising. The fledgling Empire has survived it's birthpains, and now looks to the stars to rebuild what was once theirs...
Warhammer & Mass Effect, M, English, Humor & Sci-Fi, chapters: 16, words: 82k+, favs: 417, follows: 533, updated: 7/6/2020 published: 8/4/2017
207 Victory or Death » by Knife Hand Four Hundred Thousand players log into the much anticipated Warhammer 40K Apocalypse Online, only to find themselves trapped inside with no way out. 40K SAO crossover. Chapter 52 up.
Warhammer & Sword Art Online/ソードアート・オンライン, M, English, chapters: 52, words: 92k+, favs: 459, follows: 496, updated: 6/20/2020 published: 4/19/2014
300 New world New galaxy » by Abdiel Amaro Warp storms engulf the new world. Even Nazarick can feel this chaotic power. What will the overlord of Nazarick do after arriving to a place where the only future is endless war? one grimdark future where peace is just a dream.
Warhammer & Overlord/オーバーロード, M, English, Sci-Fi & Fantasy, chapters: 11, words: 107k+, favs: 122, follows: 152, updated: 6/2/2020 published: 8/28/2018
29 A New Mission » by Patriot Games Chief and Cortana are transported to an alternate Earth after the end of Halo 3. This new world is full of dark secrets and mysteries as well as an evil plot to take over the world. But Chief saved Earth once, and with the help of some new allies he can do it again.
Halo & Walking Dead, T, English, Sci-Fi & Adventure, chapters: 11, words: 51k+, favs: 96, follows: 97, updated: 3/15/2020 published: 7/30/2019, Master Chief/John-117, Cortana, Clementine, AJ
52 Atomic Renegade » by Shaneman17 When the hearts of men grow as black as the void and no hope can be found, sometimes all it takes is a single spark to banish the darkness. When a man from a forgotten time returns home he finds a war torn galaxy waiting for him. What is a man to do for those who live in such grim darkness but to drag them kicking and screaming into the light.
Fallout & Warhammer, M, English, Adventure & Horror, chapters: 3, words: 37k+, favs: 112, follows: 141, updated: 3/13/2020 published: 4/26/2019
9 Eternal war online » by Abdiel Amaro Far different from a simple death game. Three hundred thousand players have been imprisioned inside a universe that knows no mercy. An universe where the line between reality and fiction is too thin. Welcome to Eternal War Online. Welcome to a far future where there is no peace among the stars, a grimdark future where there is only war.
Warhammer & Sword Art Online/ソードアート・オンライン, M, English, Sci-Fi & Adventure, chapters: 3, words: 30k+, favs: 30, follows: 33, updated: 2/29/2020 published: 3/2/2019
139 Imperial Warlord » by deeed22 A man and his friends are conscripted for a mission. Will they succeed in their endeavors? Will they be able to figure out whats going on? Can they make themselves a home in a strange universe?
Warhammer & Mass Effect, M, English, Adventure, chapters: 15, words: 82k+, favs: 276, follows: 367, updated: 12/24/2019 published: 6/20/2018, Imperial Guard, Adeptus Mechanicus, J. Garson
64 Halo Infinity Wars » by TheDidactsHand A one shot sequence with Captain J. Cutter himself participating in the battle of Wakanda. Note, this will be broken into Six chapters.
Halo & Avengers, T, English, Adventure, chapters: 4, words: 21k+, favs: 190, follows: 227, updated: 12/23/2019 published: 5/25/2018, J. Cutter, Captain America/Steve R.
52 The Last Wolf » by BrutalAftershock Garviel Loken, the Last Wolf of Cthonia finds himself on a world he has no recollection of. Waking up after centuries of suspended animation, he discovers that even in this new world, away from a galaxy at war, Chaos will always seep in. However Chaos finds good company in Goblins. He will have to confront the orchestrator of Chaos, while Goblin Slayer will as always. Slay Goblins.
Warhammer & Goblin Slayer/ゴブリンスレイヤー, M, English, Adventure & Horror, chapters: 5, words: 29k+, favs: 176, follows: 217, updated: 12/22/2019 published: 12/26/2018, Daemons, Grey Knights
17 Retrofuturism » by A Sharper Ship On February 10, 2534, the UNSC Spirit of Fire was declared "lost with all hands" as its lack of a slipspace drive forced it and its remaining crew to be stranded in space. Decades later, the Spirit of Fire reawakens to find Earth. Although this was not the Earth it remembers.
Fallout & Halo, M, English, Adventure & Sci-Fi, chapters: 2, words: 20k+, favs: 84, follows: 108, updated: 12/14/2019 published: 8/30/2019, Courier