20 Best Anime series like Gantz:O (2016)

Shinichi Izumi is a normal high school boy whose right hand has become infected with an alien parasite that names itself "Migi" ("right"). Migi is the first parasite to develop a symbiotic relationship with its host, as he and Shinichi slowly develop a grudging friendship. Migi isn't the only Parasite on earth, however, and as cases of Parasites killing humans begin to emerge, humans seek to kill off Parasites. Shinichi and Migi find themselves caught in between these two sides of the struggle over planet earth.

In the early 2050s, unknown life forms called “Oracle cells” begin their uncontrolled consumption of all life on Earth. Their ravenous appetite and remarkable adaptability earn them first dread, then awe, and finally the name “aragami”. In the face of an enemy completely immune to conventional weapons, urban civilization collapses, and each day humanity is driven further and further toward extinction. One single ray of hope remains for humanity. Following the development of “God Arcs”—living weapons which incorporate Oracle cells—their wielders are organized into an elite force.

A near future, where humans have been defeated by the viral parasites named Gastrea. They have been exiled into a small territory and live in despair, side-by-side in terror.In this world trapped in darkness—Rentaro, a boy living near Tokyo and member of the "Civil Security"—an organization specializing in fighting against the Gastrea—is used to accomplishing dangerous tasks. His partner is Enju, a precocious young girl. They fight thanks to their peculiar powers until one day, when they receive a special assignment from the government. This top secret mission is to prevent the destruction of Tokyo...Set in a near future, this thrilling heroic-action story... starts now!

Legendary half-vampire, half-human vampire hunter Blade is tracking Deacon Frost, a very powerful and influential vampire who killed his mother and who heads Existence, a secretive vampire organization that operates in Southeast Asia.

Several hundred years ago, humans were nearly exterminated by Titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest Titans. Flash forward to the present and the city has not seen a Titan in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as the city walls are destroyed by a Colossal Titan that appears out of thin air. As the smaller Titans flood the city, the two kids watch in horror as their mother is eaten alive. Eren vows that he will murder every single Titan and take revenge for all of mankind.

Inuyashiki Ichirou is down on his luck. While only 58 years old, his geriatric looks often have him written off as a pathetic old man by the world around him and he’s constantly ignored and disrespected by his family despite all that he’s done to support them. On top of everything else, his doctor has revealed that he has cancer and it appears that he has little time left in this world. But just when it seems things couldn’t get any worse, a blinding light in the night sky strikes the earth where Ichirou stands. He later wakes up to find himself unscathed, but he soon starts to notice that there’s something… different about himself. However, it turns out that these strange, new changes are just what Ichirou needs to take a new lease on life and now it seems like there’s nothing to stop him from being a hero worthy of the respect that he never had before… unless, that is, there was someone else out there with these same changes…

During the construction of the Kurobe Dam, an ancient artifact was discovered, and so the United Nations Kurobe Research Institute was established. Intellectuals from all over the world gathered to study the object, and the children of those researchers attend Mt. Tate International Senior High School, including the institute head's daughter, Yukina Shirahane. In the summer of 2016, a lone samurai once again awakens.

Thirty years after a disease that turns the infected into carnivorous insects emerged, a young exterminator and a teenage girl search for her mother.

The one adored as the mother is not the real parent. The people living here together are not actual siblings. The Gracefield House is where orphaned children live. An irreplaceable home where 38 siblings and Mom live happy lives, even with no blood relations. However, their everyday life suddenly came to an abrupt end one day...

Years after the horrors of Raccoon City, Leon and Claire find themselves consumed by a dark conspiracy when a viral attack ravages the White House.

Many years ago, a Great Civil War ravaged Japan, leaving the country fragmented between two regions: Kansai and Kanto. In Kansai, a group of six Akudama carry out missions given to them by a mysterious black cat, while evading the police. But a dangerous journey is about to unfold when a civilian girl becomes twisted into the Akudama's way of life and witnesses their criminal drives.

One fateful day, all of humanity was petrified by a blinding flash of light. After several millennia, high schooler Taiju awakens and finds himself lost in a world of statues. However, he's not alone! His science-loving friend Senku's been up and running for a few months and he's got a grand plan in mind, to kickstart civilization with the power of science!

The story centers around two fiercely fighting schoolgirls, Ryuuko Matoi and Satsuki Kiryuuin. On a campus ruled by force, a transfer student wielding a Basami sword brings about upheaval.

Hellsing, a secret organization of the British government, have long been battling supernatural threats to keep the people safe from the creatures of the night. The current leader, Integra Wingates Hellsing, controls her own personal army to eliminate the undead beings, but even her highly trained soldiers pale in comparison to her most trusted vampire exterminator — a vampire by the name of Alucard. Along with Integra's mysterious butler and Alucard's new vampire minion, Seras Victoria, the Hellsing Organization must face not only regular ghouls and vampires, but a rivalling secret organization from the Vatican, and Millennium, an enigmatic group of madmen spawned by a certain war over 50 years ago... A bloody battle between monsters is about to begin. The dead are dancing, and all hell is singing...

Many years have passed since humanity was driven to the brink of extinction by the sudden emergence of the unknown life forms Gadoll. Those humans that survived now dwell in a 3000m-high mobile fortress Deca-dence built to protect themselves from the Gadoll threat.Denizens of Deca-dence fall into two categories: Gears, warriors who fight the Gadoll daily, and Tankers, those without the skills to fight. One day, Natsume, a Tanker girl who dreams of becoming a Gear meets surly Kaburagi, an armor repairman of Deca-dence.This chance meeting between the seemingly two opposites, the girl with a positive attitude who never gives up on her dreams and the realist who has given up on his, will eventually shake the future course of this world.

Sudou Kaname, an ordinary high school student, receives an invitation email to try a mysterious app called "Darwin's Game." Kaname, upon launching the app, is drawn into a game where players fight one another using superpowers called Sigils. Without knowing the reason for all this, can Kaname survive furious battles against the powerful players who attack him?

In the year 2063, eight high school students and a kid are flown out to Planet Camp, tasked with surviving on their own for a few days. But shortly after arriving, an ominous glowing orb warps them to an unknown quadrant of space, nearly 5,012 light years away. Now, the only way back home is a slow, dangerous trek across the universe—a journey that’ll test them in ways Planet Camp never could.

In the 2030s Earth has been overrun by the Blue, which are mutated insect-like creatures that kill and harvest humans for food. Most of the surviving human race has moved to Second Earth, a huge spaceship that orbits the planet. Yuji and Marlene must work together to reach Second Earth and fight against the Blue.

Humans have created many stories. Joy, sadness, anger, deep emotion. Stories shake our emotions, and fascinate us. However, these are only the thoughts of bystanders. But what if the characters in the story have "intentions"? To them, are we god-like existences for bringing their story into the world? Our world is changed. Mete out punishment upon the realm of the gods. In Re:CREATORS, everyone becomes a Creator.

Jonah is a child soldier and the newest bodyguard for Koko, an international arms dealer with an entourage of hired guns. The cold-blooded kid hates Koko’s line of work, but following her into the darkest corners of the black market might be the only way he can find those responsible for his family’s slaughter. Besides, his employer isn’t like most merchants of death. She uses guile and cutthroat tactics to keep her clients armed to the teeth—all while cultivating her own warped plan for the future of world peace. With the CIA desperate for her capture, assassins eager to collect her head, and the potential for every contract to end in ultra-violence, Koko and her comrades in arms bring the boom to every corner of the world.

If you are chosen by the bizarre black sphere known as the Gantz, you are already dead—yet you might be able to reclaim your mortality. First, the Gantz demands that you undertake brutal missions of madness, killing aliens hidden among the population. It is your only chance and you have no choice. You must play this disturbing game. And if you die again—and you likely will—it’s permanent.

Many centuries ago, man's Armageddon gave birth to the vampires' wrath. As man and immortal clash, a reality-shattering threat looms. Hope resides solely in a new breed of hunter operating under the Vatican's authority. The true battle between holiness and evil has begun.

A samurai lord has bartered away his newborn son's organs to forty-eight demons in exchange for dominance on the battlefield. Yet, the abandoned infant survives thanks to a medicine man who equips him with primitive prosthetics—lethal ones with which the wronged son will use to hunt down the multitude of demons to reclaim his body one piece at a time, before confronting his father. On his journeys the young hero encounters an orphan who claims to be the greatest thief in Japan.

In 1972, the Apollo 17 mission discovered a hypergate to Mars on the surface of the moon. Soon a war breaks out between Earth and Mars, and Martian soldiers begin to descend from the sky, riding steel giants, intent on exterminating humanity.

For Brandon Heat, death doesn't matter. Driven by his need for revenge, he returns from beyond the grave to cripple Milleneon, the huge mafia organization which uses undead monsters as its enforcers. His ultimate goal is to destroy Harry MacDowel, the leader of Milleneon and, at one time, Brandon's best friend...

The protagonist, Baki Hanma, trains with an intense focus to become strong enough to surpass his father, Yujiro Hanma, the strongest fighter in the world. Five of the world's most violent and brutal death row inmates are gathering to face Baki. Their objective is to taste defeat -- their unmatched strength and skill have led them to grow bored of life itself, and they now seek out Baki in the hopes that he can overwhelm and utterly crush them. In this crisis, other underground martial art warriors gather to fight by Baki's side: Kaoru Hanayama, Gouki Shibukawa, Retsu Kaioh, and Doppo Orochi. An epic showdown between violent death row inmates and Baki and his friends begins.

15 years ago, an unknown hyperspace gate opened over the Pacific. Beyond this gate lies Reto Semaani, a strange alternate world where fairies and monsters live.San Teresa City—a city where over two million immigrants live from both worlds. As a result, there are the haves and the have-nots. Here is the world's newest "city of dreams." But in the shadow of the chaos, crime is rampant: drugs, prostitution, and weapon trafficking. The detectives who stand up to these heinous crimes are in the San Teresa City Police. When the detective Kei Matoba and the alternate-world knight Tirana—two individuals who differ in gender, personality, and even world of origin—meet, an incident erupts. Two worlds. Two justices. From this, the curtain rises on a buddy police action story!

Saichi Sugimoto is a tough soldier who participates in the Russo-Japanese War and who earned the nickname "Sugimoto the Immortal." Honors in combat are of little use to him when he is expelled from the army for a certain incident, but he has a goal to fulfill, a promise to keep, and for that he will need money. His first idea to get it will be to join the recent Hokkaido gold rush and try his luck, but destiny prepared him a more interesting challenge and at the same time, more profitable. When a strange man tells the story of how a thief stole a large amount of gold from a group of Ainu to later hide his booty, his eyes light up. Is it a false story? The man tells him that the only way to find the stolen gold is to locate a number of men who were in prison with the thief and who carry the tracks tattooed on their own bodies. But Hokkaido is a tough region and its relentless nature, so when you're still deciding if such a story is more than a Chinese tale, you'll have to fight to protect your life from a huge bear ... and who will come to your rescue is a Ainu girl who seems to know something about the story told by the old man.

Angel Beats takes place in the afterlife and focuses on Otonashi, a boy who lost his memories of his life after dying. He is enrolled into the afterlife school and meets a girl named Yuri who invites him to join the Afterlife Battlefront — an organization she leads which fights against God. The Battlefront fight against the student council president Angel, a girl with supernatural powers.

The story is set in the distant future. The land is ruined, and humanity establishes the mobile fort city Plantation. Pilots produced inside Plantation live in Mistilteinn, also know as the "birdcage." Children live there knowing nothing of the outside world or the freedom of the sky. Their lives consist of battling to carry out missions. Their enemies are mysterious giant lifeforms known as Kyouryuu, and the children pilot robots called Franxx to face off against them. For the children, riding the Franxx proves their existence. A boy named Hiro is called Code:016, and he was once known as a prodigy. However, he has fallen behind, and his existence seems unnecessary. Not piloting a Franxx is the same as ceasing to exist. One day, a mysterious girl known as "Zero Two" appears before him. Two horns grow out of her head.

High-school girl Yuri suddenly finds herself on the rooftop of a high-rise building. She's trapped in a bizarre world surrounded by skyscrapers, where a masked man cracked open a man's head with an axe before her eyes. Finding a way to survive this bizarre world, find her beloved brother, and escape becomes her top priority, but she is beset by danger not just from the mysterious Masks, which possess both inhuman strength and cruelty, but other survivors turned cruel or desparate by the insanity of the high-rise world.

Based on Sakyo Komatsu's 1973 bestseller sci-fi novel "Japan Sinks." The story is set right after the 2020 Tokyo Summer Olympics, and follows the fate of the four members of the Muto family, including the protagonist girl Ayumu and her younger brother Gou.

Karen Kohiruimaki always felt out of place in the real world. Due to her extreme height, she found it hard to make friends with other girls her age. Everything changes when she's introduced to VR and Gun Gale Online. In GGO, Karen is free to play the cute, chibi avatar of her dreams! Can Karen find friendship in this bullet-ridden MMO...?

Sōya Kuroi has dreams of people with superpowers fighting a massive dragon in the sky, but his real life is almost as weird. He's had amnesia for about two weeks and been taken in by a maid and an anthropomorphic cat. When a UFO in the shape of a stuffed bear approaches Sorimasaka City and other metros around the world, he's startled to see seven rainbow-sparkling heroes zoom out to confront it – just like in his dream. Even weirder, the maid wants him to leave his shelter to confront these heroes and take the source of their power.

One day, New York City as we know it vanished overnight into a mysterious fog. Now known as Hellsalem's Lot, it has become a place where another world beyond imagining is connected to our reality. The balance within this new world is protected by a secret society known as Libra. Leo, a journalist and photographer who arrives in the city, is unexpectedly recruited to join their ranks.

A gate to another dimension has burst open, and from it emerge gigantic invincible creatures that threaten all of humanity. Earth's only defense is a mysterious group of warriors who have co-opted the alien technology in order to fight back!

In 2014, aliens revealed themselves to request trade with humanity. In exchange for limestone, they would provide a consciousness-controlled general-use robot known as an "Exoframe." Cheaper than an aircraft, tank, or firearm, and easy enough for anyone to operate, the "Exoframe" spreads change throughout the world in the blink of an eye...

The Shaman King is the one who can contact the king of spirits and reshape the world. Every 500 years, shamans, who can commune between the worlds of the living and dead, compete in the Shaman Fight to become the next Shaman King.Among those aiming for the top is a young shaman named Yoh Asakura.

In Japan in the year 2035, an accident known as the "Burst" occurs during a research project, spawning an out-of-control artificial life form called "Matter" that has spread throughout the Kurobe Gorge. The research city that was once hailed as the hope for humanity is cordoned off by the government. Two years later, 15-year-old Aiko Tachibana, who lost her family in the Burst, learns something unbelievable from Yuya Kanzaki, a new student at her school. A secret is hidden within her body, and the answer to the puzzle lies at the "Primary Point" that was the center of the Burst. Aiko resolves to infiltrate the restricted area, escorted by a team of divers and with Yuya as her guide. When boy meets girl with the fate of humanity in their hands, what new truth will come to light?

The anime's story is set in the year 2202, three years after the Yamato's return from the planet Iscandar. The people of Earth restored their planet with the Cosmo Reverse System, and they signed a peace treaty with Garmillas. In addition to reconstruction, Earth developed a new defense fleet that includes the state-of-the-art battleship Andromeda. The Earth goes down a path of military expansion, despite Starsha Iscandar's wishes. The Yamato helps accomplish this so-called peace, but it comes at the price of many invaluable sacrifices. The goddess Teresa, who prays for tranquility in space, calls the Yamato to a new voyage. The threat of Gatlantis is sweeping over the universe and approaching Earth.

Most of the world's needs are fulfilled by humanoid robots called hIE's. One day, 17-year-old Arato Endo meets the android Lacia and becomes her owner. She is one of five androids with advanced AI. Each of the five units have their own motivations, and fight to gain each other's abilities. What will the relationship between man and machine be moving forward? That is something Arato must find.

Mugen is a ferocious, animalistic warrior with a fighting style inspired by break-dancing. Jin is a ronin samurai who wanders the countryside alone. They may not be friends, but their paths continually cross. And when ditzy waitress Fuu gets them out of hot water with the local magistrate, they agree to join her search for the "samurai who smells of sunflowers."

Rinka Urushiba is a normal high school girl, until she encounters a penguin and shoals of glowing fish swimming through the sky. She looses consciousness only to awaken with the power to move through inanimate objects. At first she thought it was a hallucination if it were not for Kyotaro Azuma who witnessed the event and who, incidentally, has the ability to teleport. They decide to use their powers to combat people who might use their powers for evil.

Akira Fudo learns from his best friend Ryo Asuka that demons will revive and reclaim the world from humans. With humans hopeless against this threat, Ryo suggests combining with a demon. With this, Akira becomes Devilman, a being with the power of demon but with a human heart.

Forty years ago, the minds of Paradigm City's inhabitants were wiped clean of all recollections of the past. Now, ruled by a powerful corporation and cut off from the rest of the world by desolate wastelands, Paradigm has become a virtual police state where Negotiators like Roger Smith keep the wheels of progress, commerce, and society turning.

Humans that have been physically altered and turned into dangerous weapons are known as the Extended. Juuzou Inui awakens as one of these weapons — with amnesia. But his job as an agent investigating the Extended leads to a mysterious child with Extended ties showing up at his office. Now Inui must keep the child away from street gangs and the megacorporation Berühren, and it won't be easy.