Top 20 Popular Dark Anime Series That You Can't Miss Out.

The following are 20 Dark Anime that grasp their watchers with spine-chilling stories and hair-raising exciting bends in the road.

1. Death Note

Light Yagami is a genius high school student who is about to learn about life through a book of death. When a bored shinigami, a God of Death, named Ryuk drops a black notepad called a Death Note, Light receives power over life and death with the stroke of a pen. Determined to use this dark gift for the best, Light sets out to rid the world of evil… namely, the people he believes to be evil. Should anyone hold such power?
The consequences of Light’s actions will set the world ablaze.

2. Attack On Titan

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 of 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.

3. Parasyte

They arrive in silence and darkness. They descend from the skies. They have a hunger for human flesh. They are everywhere. They are parasites, alien creatures who must invade–and take control of–a human host to survive. And once they have infected their victims, they can assume any deadly form they choose: monsters with giant teeth, winged demons, creatures with blades for hands. But most have chosen to conceal their lethal purpose behind ordinary human faces. So no one knows their secret–except an ordinary high school student. Shin is battling for control of his own body against an alien parasite, but can he find a way to warn humanity of the horrors to come?

4. Tokyo Ghoul

The suspense horror/dark fantasy story is set in Tokyo, which is haunted by mysterious "ghouls" who are devouring humans. People are gripped by the fear of these ghouls whose identities are masked in mystery. An ordinary college student named Kaneki encounters Rize, a girl who is an avid reader like him, at the café he frequents. Little does he realize that his fate will change overnight.

5. FMAB

Alchemy is bound by this Law of Equivalent Exchange—something the young brothers Edward and Alphonse Elric only realize after attempting human transmutation: the one forbidden act of alchemy. They pay a terrible price for their transgression—Edward loses his left leg, Alphonse his physical body. It is only by the desperate sacrifice of Edward's right arm that he is able to affix Alphonse's soul to a suit of armor. Devastated and alone, it is the hope that they would both eventually return to their original bodies that gives Edward the inspiration to obtain metal limbs called "automail" and become a state alchemist, the Fullmetal Alchemist.
Three years of searching later, the brothers seek the Philosopher's Stone, a mythical relic that allows an alchemist to overcome the Law of Equivalent Exchange. Even with military allies Colonel Roy Mustang, Lieutenant Riza Hawkeye, and Lieutenant Colonel Maes Hughes on their side, the brothers find themselves caught up in a nationwide conspiracy that leads them not only to the true nature of the elusive Philosopher's Stone, but their country's murky history as well. In between finding a serial killer and racing against time, Edward and Alphonse must ask themselves if what they are doing will make them human again... or take away their humanity.

6. Death Parade

When two people die at the same time, they’re sent to a place that’s neither heaven nor hell—a lavish bar between worlds where the stakes are high and the rules are simple: if you win you live again, if you die… you’re gone for good.
Decim is the bartender charged with serving the souls who enter Quindecim. He may make a mean cocktail, but his true profession is to play the role of arbiter—a judge who determines whether or not a soul is worthy of reincarnation. To aid in his judgment, the bar’s patrons are forced to play simple games laced with sadistic twists designed to bring their true natures to light. To Decim, judgment has always been black and white—that is—until he meets a mysterious young woman whose fate seems impossible to decide. His indecision shakes the very foundation of the games and raises the biggest question of all: Who is fit to judge the dead?

7. Promised Neverland

Emma, Norman and Ray are the brightest kids at the Grace Field House orphanage. And under the care of the woman they refer to as “Mom,” all the kids have enjoyed a comfortable life. Good food, clean clothes and the perfect environment to learn—what more could an orphan ask for? One day, though, Emma and Norman uncover the dark truth of the outside world they are forbidden from seeing.

8. Fate Zero

With the promise of granting any wish, the omnipotent Holy Grail triggered three wars in the past, each too cruel and fierce to leave a victor. In spite of that, the wealthy Einzbern family is confident that the Fourth Holy Grail War will be different; namely, with a vessel of the Holy Grail now in their grasp. Solely for this reason, the much hated "Magus Killer" Kiritsugu Emiya is hired by the Einzberns, with marriage to their only daughter Irisviel as binding contract.
Kiritsugu now stands at the center of a cutthroat game of survival, facing off against six other participants, each armed with an ancient familiar, and fueled by unique desires and ideals. Accompanied by his own familiar, Saber, the notorious mercenary soon finds his greatest opponent in Kirei Kotomine, a priest who seeks salvation from the emptiness within himself in pursuit of Kiritsugu.
Based on the light novel written by Gen Urobuchi, Fate/Zero depicts the events of the Fourth Holy Grail War—10 years prior to Fate/stay night. Witness a battle royale in which no one is guaranteed to survive.

9. Akame Ga Kill

In a land where corruption rules and a ruthless Prime Minister has turned the puppet Emperor's armies of soldiers, assassins and secret police against the people, only one force dares to stand against them: Night Raid, an elite team of relentless killers, each equipped with an Imperial Arm - legendary weapons with unique and incredible powers created in the distant past.
Rescued from a fate worse than death by Night Raid, young Tatsumi is offered the chance to join their lethal ranks… but it's a deadly choice, as few can master an Imperial Arm and even fewer survive when two Arms go against each other in combat. The battle is on, and only the strongest will make it out alive.

10. Psycho Pass

Justice, and the enforcement of it, has changed. In the 22nd century, Japan enforces the Sibyl System, an objective means of determining the threat level of each citizen by examining their mental state for signs of criminal intent, known as their Psycho-Pass. Inspectors uphold the law by subjugating, often with lethal force, anyone harboring the slightest ill-will; alongside them are Enforcers, jaded Inspectors that have become latent criminals, granted relative freedom in exchange for carrying out the Inspectors' dirty work.
Into this world steps Akane Tsunemori, a young woman with an honest desire to uphold justice. However, as she works alongside veteran Enforcer Shinya Kougami, she soon learns that the Sibyl System's judgments are not as perfect as her fellow Inspectors assume. With everything she has known turned on its head, Akane wrestles with the question of what justice truly is, and whether it can be upheld through the use of a system that may already be corrupt.

11. Jormungand

A ruthless arms dealer on a quixotic quest for world peace. A child soldier born into chaotic conflict. Their lives will intertwine as they journey together through the seedy underbelly of the world's arms market.

12. Gunslinger Girl

"Henrietta" was an innocent little girl when her entire family was massacred and she was left for dead. She was rescued by a privately-owned social welfare organization and given cybernetic components over her battered body. Brainwashed by the organization, she and four other girls now work as cold-blooded assassins, doing the dirty work for the Italian government.

13. Hell Girl

Somewhere in the vast sea of the Internet, there's a website that can only be accessed at the stroke of midnight. Known as the Jigoku Tsushin, rumor has it that if you post a grudge there, the Jigoku Shoujo will appear and drag whoever torments you into the inferno. Very little is known about the girl - all we know for sure is that she lives with her equally enigmatic grandmother, that three magical straw dolls accompany and serve her, and that whenever a posting on the Jigoku Tsushin moves her, she becomes the Jigoku Shoujo.

14. Classroom Of The Elite

Koudo Ikusei Senior High School is a leading school with state-of-the-art facilities. The students there have the freedom to wear any hairstyle and bring any personal effects they desire. Koudo Ikusei is like a utopia, but the truth is that only the most superior students receive favorable treatment.
Kiyotaka Ayanokouji is a student of D-class, which is where the school dumps its "inferior" students in order to ridicule them. For a certain reason, Kiyotaka was careless on his entrance examination, and was put in D-class. After meeting Suzune Horikita and Kikyou Kushida, two other students in his class, Kiyotaka's situation begins to change.

15. School Live

Why would anyone form a School Living Club? Could four girls, their advisor, and a puppy really love their school so much that they’d want to live in it? Or is there another reason, something that lurks behind the façade of their comfortable existence? Something that waits outside their school’s doors. Something that has already robbed one girl of her sanity? While the others try to come to grips with a dark new reality, the rest of the world falls to ruin at the hands of a ravenous force, and insanity may be the last hope for survival. Shocks, heartbreak and stunning revelations await as the twisted tale unfolds.

16. Shiki

During a fiercely hot summer in Sotoba, a peaceful and quiet village with a population of 1300 people, a series of bizarre deaths begin to occur. At the same time, a strange family moves into a long abandoned mansion in the region. After supposedly visiting this strange family, the fashionable Shimizu Megumi goes missing and the entire village goes out in search for her.

17. Monster

Dr. Kenzo Tenma is a renowned Japanese brain surgeon working at a leading hospital in Germany. One night, Dr. Tenma risks his reputation and career to save the life of a critically wounded young boy over that of the town mayor who had been planning to support the hospital financially. A string of mysterious murders begin to occur soon after the operation, and Dr. Tenma emerges as the primary suspect despite no incriminating evidence.
A doctor is taught to believe that all life is equal; however, when another series of murders occur in the surgeon's vicinity, Dr. Tenma's beliefs are shaken as his actions that night are shown to have much broader consequences than he could have imagined. Leaving behind his life as a surgeon he embarks on a journey across the country to unravel the mystery of the boy he saved.

18. Kino's Travels - The Beautiful World

Based on a hit light novel series by Keiichi Sigsawa, the philosophical Kino's Journey employs the time-honored motif of the road trip as a vehicle for self-discovery and universal truth. Deeply meditative and cooler than zero, the series follows the existential adventures of the apt marksman Kino along with talking motorcycle Hermes as they travel the world and learn much about themselves in the process. Imaginative, thought-provoking, and sometimes disturbing, Kino's journey is documented in an episodic style with an emphasis on atmosphere rather than action or plot, though still prevalent.

19. School Days

Makoto Ito is a young Japanese high school student beginning his second term at the fictional Sakakino Academy. During his daily train rides to and from school, he becomes infatuated with fellow student Kotonoha Katsura; a girl that also commutes. When a new classmate acquaintance of his, Sekai Saionji, discovers his secret crush on Kotonoha, she helps introduce both of them to each other and over time they grow closer and agree to date. However in spite of her proud and triumphant matchmaking efforts, Sekai inadvertently becomes jealous of the new couple, having also developed feelings toward Makoto.
The following afternoon on her way home at the nearby train station in front of the school, Sekai finds Makoto waiting for Kotonoha to rendezvous for a date. He sits with her and reiterates his appreciation for her help, and feeling heavily indebted, offers repayment anyway he can. Though she believes he is overreacting, Sekai decides to redeem her obligation by placing a kiss on his lips as her train pulls in; quickly rushing into an open passenger car and happily bidding a dumbstruck Makoto luck on his date.

20. God Eater