Fate/Zero (2011)

There was once a Holy Grail War waged by Mages and Heroic Spirits in a town of Fuyuki. However, one Mage took advantage of the chaos of World War II to steal a Holy Grail. Several decades have passed, and the Yggdmillennia family, who took upon the Holy Grail as its symbol, defected from the Mages' Association. Furious, the Association sent forces to deal with the Yggdmillennia, but were defeated. With the Holy Grail system changed, war at an unprecedented scale breaks out.

Waking up in a strange virtual world with no recollection of the past, Hakuno finds himself forced to fight for survival in a war he does not understand for a prize beyond value; the opportunity to have one's wish granted. With only an enigmatic "Servant" by his side, Hakuno Kishinami will have to face both friends and foes in battles to the death in order to not only gain possession of a mysterious object known as the "Holy Grail," but also to find the answer to the most important question of all: "Who am I?"

Following the success in the Camelot Singularity, Ritsuka Fujimaru and Mash Kyrielight are assigned to the last Singularity in the Grand Order initiative. In Ancient Babylonia, 2500 BCE, they embark on a mission to secure humanity's survival. Upon arrival, they learn that three gods have threatened Uruk, the Babylonian city ruled by King Gilgamesh. Ritsuka and Mash must work together to fend off the invasion of mysterious beasts in Uruk under Gilgamesh's orders while investigating the true nature of the three gods' actions against humanity; but unknown to Ritsuka, an ancient entity is slowly rising from its slumber.

For a chance at a pardon, a ninja assassin joins other condemned criminals on a journey to a mysterious island to retrieve an elixir of immortality.

Before eradicating humankind from the world, the gods give them one last chance to prove themselves worthy of survival. Let the Ragnarok battles begin.

To gain the skills he needs to surpass his powerful father, Baki enters Arizona State Prison to take on the notorious inmate known as Mr. Unchained.

The huge Katvana Empire is at war with the neighboring Kioka republic. In a corner of the empire, a young man is about be caught up in the flames of war. His name is Ikta Solork. He's lazy, a philanderer, and he hates war. He's about as far from a soldier as you can get. On his way towards the next stage of officer's qualification exams, he and his childhood friend Yatorishino Igsem encounter the nurse trainee Harouma Beckle, Mashuu Tetrijirch, a member of the old military faction, and Torwey Lemion....

In a city of the dead, long since ruined and far from human civilization, lives a single human child. His name is Will, and he's being raised by three undead: the hearty skeletal warrior, Blood; the graceful mummified priestess, Mary; and the crotchety spectral sorcerer, Gus. The three pour love into the boy, and teach him all they know. But one day, Will starts to wonder: "Who am I?" Will must unravel the mysteries of this faraway dead man's land, and unearth the secret pasts of the undead. He must learn the love and mercy of the good gods, and the bigotry and madness of the bad. And when he knows it all, the boy will take his first step on the path to becoming a Paladin.

Akira Oda and his high school classmates are summoned to another world! While the other students are granted cheat abilities through the summoning, Akira merely gains the abilities of a mediocre "assassin." However, his status soon surpasses "hero," the strongest profession. After Akira becomes suspicious of the King behind the summoning, he is falsely framed for a crime and forced to flee.

The future-fantasy world of Remnant is filled with ravenous monsters, treacherous terrain, and more villains than you can shake a sniper-scythe at. Fortunately, Beacon Academy is training Huntsmen and Huntresses to battle the evils of the world, and Ruby, Weiss, Blake, and Yang are ready for their first day of class.