184 Ascendant » by evevee A single ship can change a galaxy. The Normandy had already proven that, yet much like that vessel this new wreck was also dead. So it seemed at first at least, but just because something is dead does not mean it is forgotten.
Halo & Mass Effect, K+, English, Sci-Fi, chapters: 5, words: 38k+, favs: 438, follows: 559, updated: 22h published: 8/21, Liara T'Soni
1k+ Devil Overlord » by Snowmistys Rating Game went poorly for everyone involved. For Rias, who had to watch her peerage suffer. For Issei, who found himself speared through the heart with a lance of fire at the ending minutes of the Game. When one soul left, however, another one woke in his place. And when Momonga saw a lance of fire in his chest, the Rating Game went poorly for Riser Phenix as well.
High School DxD/ハイスクールD×D & Overlord/オーバーロード, M, English, Adventure, chapters: 85, words: 446k+, favs: 1k+, follows: 1k+, updated: 9/18 published: 3/25, Rias G., Ainz
378My New Life - Worm: The Celestial Forge and its eccentric master » by Demon dark mezzo sangue Inspired by Brockton's Celestial Forge and Tinker of Fiction. A great lover of the Celestial Forge, he renounces living his dreams as a writer, but struck by the inspiration, he begins to write his original story, for an unknown reason, it ends up inside the body of the newly created character. Good part has owns the Celestial Force,the bad part finds himself as Taylor's cousin.
Worm, K+, English, Adventure & Friendship, chapters: 47, words: 557k+, favs: 388, follows: 451, updated: 9/16 published: 2/11, Skitter, Panacea, OC, Parian
259Loopholes » by DschingisKhan Louise didn't summon a dragon or a loser from another world. No, she summoned a girl from across the yard. How humiliating! But why is Tabitha agreeing to be her familiar? And how many teenage girls does it take to destabilise a geopolitical region anyway?
Familiar of Zero, T, English, Humor & Romance, chapters: 34, words: 71k+, favs: 802, follows: 1k+, updated: 9/15 published: 2/28/2016, [Louise, Tabitha, Kirche]
15 Spartan justice » by Thorimus Daughter of the ghost of Sparta and the last guardian of Midgard, Xena find herself in a future where the so-called heroes never punish crime. OC x Harem. Rated M for nudity, violence and vore
Justice League & God of War, M, English, Supernatural & Sci-Fi, chapters: 9, words: 15k+, favs: 42, follows: 44, updated: 9/14 published: 12/6/2020, [Diana of Themyscira/Wonder Woman, OC, Harleen Q./Harley, Zatanna Z.]
4k+ Harry Potter the Mutant Obscurus Gamer » by GnomeBob The Fates of the MCU have written for Harry Potter to die during a failed Obscurial Transformation. A drunken conversation between the heads of the Marvel verse has changed that and Harry has ended up with Gamer powers among other things. Watch Harry go through Hogwarts, Kamar-Taj, and Xavier's institute as he learns to use his powers and level up. Contains a Flerken. Harem by Arc3
Harry Potter & Avengers, T, English, Adventure & Humor, chapters: 89, words: 467k+, favs: 6k+, follows: 8k+, updated: 9/14 published: 4/24/2020, Harry P.
84 Harry Potter and the Fluffy Taile » by Tatsurou-san SQUIRREL! ...now that I have your attention... Harry meets someone new at Ollivanders, a friend who is bound and determined that Harry get all the affection and hugs he missed out on for most of his life. He's not about to tell her no... Prepare for fluff...of more than one kind...
Harry Potter & Sword in the Stone, K+, English, Humor & Hurt/Comfort, chapters: 14, words: 22k+, favs: 205, follows: 238, updated: 9/12 published: 5/24, Harry P.
3k+ The Weaver Option » by Antony444 It is the 45th Millennium and the galaxy is dying. On the verge of victory over the Imperium, the Chaos forces have proven unable to stem the tide against the Great Devourer and its trillions of Tyranids. Only one option: cross the dimensions, find a hero able to triumph where billions have utterly failed and change the course of the past...
Warhammer & Worm, M, English, Sci-Fi & Adventure, chapters: 50, words: 1196k+, favs: 3k+, follows: 3k+, updated: 9/10 published: 8/23/2016
2k+ Enduring the Flames of War » by Masterdude21 A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Halo & Mass Effect, M, English, Sci-Fi & Horror, chapters: 41, words: 585k+, favs: 3k+, follows: 3k+, updated: 9/9 published: 11/30/2015, Master Chief/John-117, OC, Shepard
358 Mass Effect: Galaxy at war » by palik A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival
Halo & Mass Effect, M, English, Sci-Fi, chapters: 20, words: 67k+, favs: 797, follows: 1k+, updated: 9/6 published: 6/18/2020
184 Overlord Crossover: SI - OC - The Mishap's Chance » by DG2 A self insert transfers into the game of Yggdrasil. Unable to escape, he will use his knowledge on Overlord to prepare himself for the future. Little does he know his second transfer will land him in a unexpected place. A place he is more than familiar with. (Male SI, Third Person)
Elder Scroll series & Overlord/オーバーロード, T, English, Fantasy & Adventure, chapters: 10, words: 118k+, favs: 742, follows: 931, updated: 9/3 published: 3/8, The Eternal Champion, Barenziah, Ainz, OC
142 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: 16, words: 96k+, favs: 278, follows: 371, updated: 8/30 published: 6/20/2018, Imperial Guard, Adeptus Mechanicus, J. Garson
249 Harriet Potter: The Demon Empress » by PaulyThide Harriet Potter, The-Girl-Who-Lived has a secret, a big one. She is not what everyone thinks she is. Hiding her true self, she will learn to live once again and show everyone, why you don't mess with a Supreme Being. But first, she must eat and sleep. (Fem Harry Potter) (Reincarnated Fem/Suzuki Satoru)
Harry Potter & Overlord/オーバーロード, M, English, Fantasy, chapters: 11, words: 76k+, favs: 1k+, follows: 1k+, updated: 8/26 published: 3/5, James P., Lily Evans P., Albedo, OC
409 Sins: The Evil You Create REBOOT » by Nightmares Around Winter When everything you know has come crashing done, how do you rebuild it? When everyone you care for turns their back on you, what can you do? When your friends and allies turn on you, where can turn to if not your enemies? Titan-turn-Villain Danny Phantom. Rated M for reasons. Massive harem. Don't like don't read. Rebooted version, DCAU X DP crossover.
Teen Titans & Danny Phantom, M, English, Horror & Adventure, chapters: 17, words: 68k+, favs: 765, follows: 860, updated: 8/25 published: 6/22/2015
1k+ The Reclamation » by Fade Maybe Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.
Halo & Mass Effect, T, English, Adventure & Sci-Fi, chapters: 51, words: 388k+, favs: 1k+, follows: 1k+, updated: 8/22 published: 3/13/2013
668 A Gamers rise in Marvel » by La Pucelle Altre Life can end abruptly and painfully. Thanks to some cosmic chance our female Protagonist gets a new life with the abilities of the gamer on her side. She will live her life to the fullest without concern for who gets in her way, be that hero or villain. Selfish Evil Mc. lemons later on. Marvelcentric with franchises mixed in (Mainly Fate, DC, Highschool DXD, Harry Potter).
Marvel & Anime X-overs, M, English, Adventure & Supernatural, chapters: 30, words: 254k+, favs: 1k+, follows: 2k+, updated: 8/21 published: 7/27/2020
64 Kell of Light » by Max7238 Fallen. Called such because the Traveler abandoned them for turning its Light on each other. But Light can have no idle tools. When Morik turns away from his culture to the Light, it seizes him. Now he will rise, and show the Fallen what it means to be Kell. From the ranks of Vanguards, to leader of his House, out of the Dark. Discord at .gg/eaHKXUf, updated Aug28th, 2021. Complete
Destiny, T, English, Sci-Fi, chapters: 30, words: 101k+, favs: 280, follows: 256, updated: 8/20 published: 6/1/2015, OC, Fallen
871 Adeptum Effectus » by Reddevel360 "Killing a man will harden you. Fighting a war against genocide will harden a species. Why are we so ruthless Councilor? Because when fighting for your very existence, anything is acceptable."-Lord Hood. Featuring a Humanity that discovered the archives on Mars in the midst of fighting an war for their very survival, a war that destined to be a massacre turns into a stalemate -Hia
Halo & Mass Effect, M, English, Sci-Fi & Tragedy, chapters: 14, words: 90k+, favs: 2k+, follows: 3k+, updated: 8/19 published: 5/10/2019, Master Chief/John-117, T. Hood, Admiral Hackett, Councilor Sparatus
352 Demons in Amity Park » by Phantom Fan 21 One week after Danny returns from Hell, Danny spends time with the girls he brought back. But with the mystery of who send him to hell and why. Danny must balance the mystery and his feeling for the girls. DannyXAll girls. Harem. Spin-off Lemon is up.
Danny Phantom & Helltaker, M, English, Romance & Supernatural, chapters: 56, words: 141k+, favs: 279, follows: 285, updated: 8/17 published: 11/29/2020, [Danny F., Judgement, Lucifer, Malina]
242 The Greatest Prison » by evevee Tracer never talked about her time as a lost soul. She's known now as the excitable Brit, the puppy of Overwatch, the fearless point on any offensive. Winston had always suspected some form of trauma, and Widow had proved that at King's Row. Unbeknownst to all, her true terror approaches, and as one wise man once said, "If you were his enemy...may god help you." -Hiatus until OW2
Halo & Overwatch, M, English, Sci-Fi & Adventure, chapters: 15, words: 71k+, favs: 807, follows: 1k+, updated: 8/10 published: 9/12/2016, Master Chief/John-117, Arbiter, Amélie L./Widowmaker, Lena O./Tracer