216 Halo: Mechwarrior » by IX404 (AU). When the SLDF began it's invasion of Clan controlled space in 3054, 'MechWarrior Alex Wolverine felt that it was the death knell of the Crusader Clans. Little does he and his friends know, is that they will soon enter a universe where Humanity is on the run from an alien alliance... and a horrific and merciless foe. (Now a multicrossover with Mass Effect).
Mechwarrior/Battletech & Halo, T, English, Sci-Fi & Drama, chapters: 64, words: 463k+, favs: 125, follows: 151, updated: 7h published: 7/7, Master Chief/John-117, Arbiter, Cortana, OC
766 My Hero Academia: The Slayer of Villains » by reeleffendeel Following the conclusion of DOOM 2016, Samuel Hayden unknowingly sends The Doomslayer into a world of Heroes and Villians. But when the Demons invade the alternate world, The Unchained Predator will need the help of it's Heroes...and it's guardian Angel.
Doom & My Hero Academia/僕のヒーローアカデミア, M, English, Horror & Adventure, chapters: 11, words: 34k+, favs: 1k+, follows: 1k+, updated: 11/26 published: 4/10, [Doomguy, Rumi U./Mirku] Izuku M., Toshinori Y./All Might
345 Halo: Termination » by IX404 Near the end of the war, the Covenant thought Humanity was finished. Little do they know, is that they will soon meet their worst nightmare: a remorseless, emotionless and utterly relentless machine. It's goals: protect Humanity, and terminate the Covenant.
Terminator & Halo, T, English, Sci-Fi & Drama, chapters: 36, words: 230k+, favs: 286, follows: 315, updated: 11/26 published: 7/17, The Terminator, Master Chief/John-117, Arbiter, SPARTAN-B312/Noble Six
1k+ Thieves Can Be Heroes! » by Mugiwara N0 Luffy Izuku Midoriya thought he was down on his luck the day that he was convicted of a crime for trying to save someone. As if being Quirkless wasn't enough, how was he supposed to become a hero with a criminal record? As it turns out, fate had another plan for him.
Persona Series & My Hero Academia/僕のヒーローアカデミア, T, English, Supernatural & Adventure, chapters: 37, words: 389k+, favs: 2k+, follows: 2k+, updated: 11/25 published: 6/16/2017, Morgana, Ann T., Ryuji S., Izuku M.
1k+GATE: OPERATION TIGER STRIKE » by UH-60 NIGHTSTALKER A Gate opens up in the heart of Ginza and the invasion that come leaves thousands either dead, wounded or missing. Little did the invading army realize, it would not be just one nation that would respond to their hostile actions.
Gate - Jietai Kare no Chi nite, Kaku Tatakeri, T, English, Humor & Adventure, chapters: 59, words: 218k+, favs: 716, follows: 837, updated: 11/21 published: 12/30/2018
194 Fate Grand Order: Slayer Chronicles » by Seanathan311 A young master in peril summons a servant in her time of need, but he was not a hero of her world. Ritsuka summons The Doomslayer under the class of Berserker and must work along with her friends to save her world from destruction. All the meanwhile learning about this mysterious demon slayer from another world.
Doom & Fate/stay night, M, English, Adventure & Fantasy, chapters: 10, words: 65k+, favs: 581, follows: 706, updated: 11/17 published: 5/31
186 Hunter Among Reapers » by Dandy Chiggins Nero's life takes an unexpected turn when while on a job he finds himself flung in a new world. Where not Demons but Hollows threaten the safety of mankind and Shinigami (Soul Reapers) are tasked with stopping them. Nero must find his path in the new world but it seems that like any good Devil Hunter he just cant help get himself tangled in all sorts of trouble.
Devil May Cry & Bleach, T, English, Adventure & Fantasy, chapters: 22, words: 265k+, favs: 414, follows: 501, updated: 11/17 published: 10/14/2019, Nero, Ichigo K.
264 Kingdom Hearts: My Keyblade Academia » by Sora Sentry "There's no such thing as a quirkless hero" That is what people kept telling to Izuku Midoriya through all of his life. He understood it, even now that he was bestowed with All Might's quirk. However he kept wondering if it was possible if not here maybe somewhere else. He was about to find out when he enters UA academy and meet two interesting boys. Life's about to change forever.
Kingdom Hearts & My Hero Academia/僕のヒーローアカデミア, T, English, Adventure & Fantasy, chapters: 18, words: 238k+, favs: 318, follows: 351, updated: 11/16 published: 7/24/2019, Sora, Riku, Izuku M., Katsuki B.
77 Adventure in Another World » by Geolight164 During his fight with Eternatus, Victor finds himself trapped in another world. Given sanctuary at Hogwarts, he is unsure if he will ever find his way home. But with a magical tournament, some new friends, and a ministry watching him, this adventure wont be boring. Cross-Posted on AO3.
Pokémon & Harry Potter, T, English, Adventure & Friendship, chapters: 20, words: 76k+, favs: 80, follows: 97, updated: 11/15 published: 2/8, Victor/Masaru, Harry P., Albus D.
64 Fate Grand Order: Kar en Tuk » by Alter Atalanta Our favorite guy will now travel through many periods of human history, in order to undo the incineration humanity. And of course, he'll meet many mythical figures in the way. New chapters weekly or monthly.
Doom & Fate/Grand Order, M, English, Adventure & Romance, chapters: 13, words: 261k+, favs: 111, follows: 133, updated: 11/14 published: 5/21
749 A New Beginning » by animedevilluvzyuri Six months after the creation of the new Empire, Akame reunites with Leone. With everything they've been through together in their Night Raid days and their current life, Akame longs for a new start. That wish came true when Akame and Leone suddenly arrived in a new world and meet many new people. From assassins to students, they'll learn all they can about being huntresses.
RWBY & Akame ga Kiru/アカメが斬る, T, English, Romance & Adventure, chapters: 86, words: 547k+, favs: 695, follows: 666, updated: 11/13 published: 5/13/2016, [Akame, Leone] Team RWBY
944 100 Percent Hero » by CiscoTheSoto A boy born with all the power he never wanted, Shigeo Kageyama didn't view himself as a hero. Although he saved innocent people from villains and spirits countless times, he never thought about how many lives he saved. But when he goes to a world where people with powers save others regularly, he will come to realize the impact he could have and what it really means to be a hero.
My Hero Academia/僕のヒーローアカデミア & Mob Psycho 100/モブサイコ１００, T, English, Adventure & Hurt/Comfort, chapters: 28, words: 282k+, favs: 1k+, follows: 1k+, updated: 11/12 published: 9/29/2019, Izuku M., Toshinori Y./All Might, Shigeo Kageyama/Mob
9 Halo: Dimensional Combat Spartan Heroes » by Helios Division 0156 August 30 2552, Reach has fallen, but Fire-team Helios won't back down. With the crew of the retrofitted Phoenix-Class colony ship "First Light" and a sizable military force. The escape from the burning planet change for worse with ancient technology of the Forerunners hurl the crew into a unknown and yet similar world. Act 1 of the United Nation Dimensional Command or the U,N,D,C.
Halo & My Hero Academia/僕のヒーローアカデミア, T, English, Adventure & Sci-Fi, chapters: 8, words: 10k+, favs: 55, follows: 70, updated: 11/10 published: 8/2, SPARTAN-B312/Noble Six, Cal-141, 1-A Students, Melissa S.
86 The Eostian War » by A guy named Ben The Black Dog mercenaries had risen up against the Seven Shields and are threatening to remake Eostia in their perverse image. However, as they began to carry out their plan, hope arrived from an unexpected quarter. Rated M for language, suggestive themes, blood, violence, boring exposition, the works.
Total War series & Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru, M, English, Adventure & Fantasy, chapters: 9, words: 73k+, favs: 151, follows: 176, updated: 11/7 published: 10/10/2019, Cellestine L, Prim F, OC
200 Joker's Bizarre Adventure » by VenomSpider33 P5/Part 6 AU. Jolyne Cujoh has found herself in the grasp of a twisted game. Together with her new friends, she must work with them in order to overcome this dark game. Her bizarre adventure is just beginning. Edited by Ghost Fire 6
JoJo's Bizarre Adventure & Persona Series, T, English, chapters: 27, words: 207k+, favs: 279, follows: 334, updated: 10/12 published: 5/21/2017, Jolyne C., unknown 1
58 RWBY XIII: Path of vengeance » by Azure Darkness Yugi Home destroyed, family killed, Wolf Faunus Lightning Vergil Farron seeks revenge on the ones responsible; The White Fang and the Schnee Dust Company. Can Ruby Rose save Lightning from this bloody path? Or, suffer the same fate the Dark Slayer Vergil.
Final Fantasy XIII & RWBY, T, English, Adventure & Drama, chapters: 23, words: 65k+, favs: 126, follows: 126, updated: 10/10 published: 6/4/2014, Lightning, Serah F., Ruby R., Weiss S.
563 Freedom's Ring » by DFMRCV A cruel and unforgiving world, an enemy of unclear origin hellbent on finishing a war of extermination, its victims and their desperate attempts at resisting proving just as futile as the hopes of the men who led them. Many died and would continue to die, none of them doubted that reality. But what if...
Attack on Titan/進撃の巨人 & Gate - Jietai Kare no Chi nite, Kaku Tatakeri, T, English, Mystery & Sci-Fi, chapters: 13, words: 261k+, favs: 390, follows: 467, updated: 9/30 published: 6/26/2019, Eren Y., Ilse L., Levi A., OC
33 Pokemon: Gate Version » by Wanderer101 It was a peaceful day in Castelia City when suddenly a strange structure appeared in the Central Plaza. To the surprise and horror of the city's citizens an army emerged from the structure and began slaughtering the populace. What can the peaceful pokemon world do against a world of war and barbarism?
Pokémon & Gate - Jietai Kare no Chi nite, Kaku Tatakeri, M, English, Fantasy & Adventure, chapters: 3, words: 18k+, favs: 75, follows: 85, updated: 9/22 published: 7/25
912 Link: Mage of Fairy Tail » by Tenrousha After his defeat, Ganondorf attempts to drag Link into the dimension of his banishment with him. Link retaliates, but the result sends him hurling through dimensions to land in Earthland.
Legend of Zelda & Fairy Tail, M, English, Adventure & Fantasy, chapters: 45, words: 353k+, favs: 1k+, follows: 1k+, updated: 9/14 published: 5/15/2010, Link
1k+ Avengers: Infinite Wars » by free man writer The Clone Wars are in full swing with the galaxy divided. The Jedi lead the clone army against the infinite droid army of the Separatists. Yet a wild card enters the fray. The Avengers. From there, newer, more sinister and deadlier threats emerge and The Galaxy, no, the universe, shall never be the same again. Phase 2. Co-written by Jebest4781.
Star Wars & Avengers, T, English, Adventure, chapters: 45, words: 469k+, favs: 975, follows: 999, updated: 9/11 published: 12/4/2016, Anakin Skywalker, Obi-Wan K., Captain America/Steve R., Spider-Man/Peter Parker