Chaldea is an organization, created to protect humanity. Be it from the supernatural, foreign. domestic, human or alien Chaldea is meant to protect humanity and its future. When Chaldea is sent to a new world full of superheroes and supervillains by unknown means, Heroes of legends and heroes of the modern age ideals clash, as they end up in the worst city possible: Gotham.

Fate is a strange thing. One moment you are trying to remember some memories, and the next you are sailing the Blue Seas with a historical pirate. Who knows what Fate has in store for me next? (SI-OC)

On her deathbed, Myne gains the memories of a Japanese woman, starting her off on a lifelong journey. Only this time, it isn't an inspiring librarian, but a powerful magus with dreams of becoming a true Magician. Equipped with Rin's memories, Myne is on a mission to gather all the knowledge she can and master the Mysteries of this new world.

In the shop, we have everything when we say everything, means everything but of course are you willing to pay the price for receiving them? There's nothing free, everything has a price. - [Full summary inside]

Dead in my sleep, waking up in the body of Scathach from Fate and being watched over by Xigbar from Kingdom Hearts of all people. Not how I expected my new life to start out but I have no desire to waste it! Once again, Genderbending Hijinx, plenty of monster killing and Claiming Waifu. Welcome to Wrapped in Shadows! SI (Self-Insert) Story

Four months have passed since the events at Argus, and Rin is now in Atlas working alongside Ironwood in an investigation to determine who is behind the kidnappings in Mantle. (Sequel to Argus Magus)

Ginger Graham was just a normal guy who wanted to live a normal life. He wasn't a huntsman and didn't want to be one. Let his friends go off and save the world. He'd rather read a good book. Too bad some magic lady forced some magic cards with the power of legendary heroes onto him without consent and now is getting dragged into trouble. Where did his normal, peaceful life go...?

The Black Dragon was an insurmountable beast whose power defied the natural order. So long as the creature existed, the Age of Mystery would never end in Genkai. Humanity would need more than just the myth of the Argonaut to vanquish this tyrannical evil. Hope will arrive in the world of gods and monsters as the legend of Arthur Pendragon shall be reborn.

[AAU, OCC characters] The man who saved Irisiviel von Einzbern from the living hell she was suffering as a vessel of Der Heilige Gral was not a grizzled mercenary disillusioned with the world. No, this time around it was a businessman and his wife visiting the vaterland on a business trip. Many years later, Hyoudou Issei learns the truth about his rather unusual family...

To protect his sister and himself from Britannia's politics following Japan becoming Area 11 he made a deal with the Head of the Animusphere Family. In exchange for becoming a master for Chaldea when the time came Lelouch and Nunnally would be hidden and protected. Lelouch travels to Chaldea to fulfill his end of his agreement unaware of what is awaiting him. Has a Tvtropes page.

Forced into a war not his own, Raiden must adjust to a world of mages he never knew existed. Lost in time once again, Jack the Ripper must face historical legends large and small while trying to find himself, balancing the man and the killer trapped within the same mind, to discover who he truly is.

Beyond the Human life, beyond from the Sea of Stars, a power beyond my reach shall soon be in my palms to control and use. In now a digitized World, I am one step closer to my goal of becoming a God. I shall use the power of the Gods to ensure my legacy, my Eternal Empire, and my ideal future for Humanity shall be eternal. Fate/Grand Order: New Order- The Umbral Star: Patricius.

After sacrificing his arm before his demise, Emiya fulfilled his desires to never let the past repeat itself. The man expected to return in a land surrounded by swords, waiting for his next orders, forever alone and broken. Unbeknownst to him, fate had other plans for the Counter Guardian... one that came to fulfill his long desired wish.

The Fuyuki Grail War, a legendary battle of Servants and magi that are fighting to have their wishes and dreams granted. This world should have touched a Heaven's Feel but thanks to the new 7 masters, this war was going to go down into something truly Nightmarish. And it all started when an Einzbern met a Hero of the Stars. A Multicrossover with other series

An experiment gone wrong, or possibly right? A nascent Kaleidoscope opens his eyes. A Fate/DxD/Multicross story. Thanks to TheMadLad for the cover image.

Holy Grail War. A ritual involving 7 Masters and 7 Servants, legends of the old, meet each other in clash of death until sole pair of Master and Servant achive victorious. Now, lets change some of this legends with a less old one. Multi-X.

Una joven, con un pasado oscuro y horrible, salvada y entrenada por el Caleidoscopio, llega a Chaldea en una misión de su maestro, pero se vuelve una inesperadamente una batalla por el orden humano. Ahora, ella no solo tendrá que pelear al lado de aquellos que son la esperanza de la humanidad, sino también a abrir su cerrado corazón. (Mithraxharem)

Long before the Gods descended, mortals rely on Spirits to fight against monsters. Others managed to unlock limitless abilities. But there was one who stood out from the rest. A hero who was anything but strong, even pitiful. But his tale drew laughter from all. Summoned forth in dark times, Argonaut returns for another laugh. Smile! Laugh! Let us start the comedy once again.

DOOM X Fate/Grand Order X Godzilla X High School DxD X More! Two Gods, two beings with power unimaginable to the mortals below. Both find themselves fighting an eternal enemy, forced to rely on each other. Both push away the notion, yet find themselves on an adventure which will teach them the tragedy of humanity.

The Final Dark God finds himself in Orario. Perhaps now, he will find out what it means to truly be a god? Likely to be a one-shot for now, unless it is considered acceptable to expand upon it.

As the Fourth Holy Grail War approaches, servants are summoned by masters to fight for the ultimate wish. But due to the meddling of an unknown force, an unprecedented servant is summoned into this war. How will the Magus and servants of the modern era deal with the greatest Wizard of his time from another world?

Un delincuente juvenil tiene un encuentro con un ladrón y un espejo y eso lo llevó a una tierra desconocida, una versión de la antigua China donde los generales de los tres reinos son mujeres, para sumarlo, descubre que su antepasado es cierto guerrero celta que posee una lanza y hereda su fuerza y habilidad, el viaje para volver a casa inicia.

When I killed myself, I didn't expect to wake up, alive again in a young body that's objectively superior than my old one in almost every way. I certainly didn't expect to wake up in the convoluted mess that was Nasuverse with the nerfed, but still legendary and well coveted Game... Wait, was that Gilgamesh! (Gamer!SI-OC/Multi) Currently in: The Witcher 3 – Wild Hunt

2015; the 5th Holy Grail War is about to begin in Fuyuki City. Amidst the magi and servants fighting for the wish-granting artifact is a girl with no knowledge of magecraft whatsoever. Yet, this girl has decided to become one of the seven masters to fulfill the wish science was unable to grant her. While the fight for humanity's survival still continues, a new war is about to begin

Running Nazarick has never been an easy task for anybody, much less Ainz. But if he thought ruling over his NPCs was hard, now he has to deal with actual legends given form, some of them who even tried to destroy humanity once. Add to that, the New Worlds' difficulty skyrocketed for some reason, so our lovable Overlord has his plate more than full at the moment.