Top 10 Mystery Thriller Anime of All Time

 (Number doesn't mean any ranking)

These animes below will mess with your mind in more ways than one.

10. Madoka Magica.

Madoka Kaname and Sayaka Miki are regular middle school girls with regular lives, but all that changes when they encounter Kyuubey and Homura Akemi. Kyuubey offers them a proposition: he will grant any one of their wishes and in exchange, they will each become a magical girl, gaining enough power to fulfill their dreams. However, Homura Akemi, a magical girl herself, urges them not to accept the offer, stating that everything is not what it seems.

Genre: Drama, Magic, Psychological, Thriller
Episodes: 12
Status: Completed
Other name: マギアレコード 魔法少女まどか☆マギカ外伝 2nd Season

9. Terror in Resonance.

Zankyou no Terror tells the story of "Nine" and "Twelve", the two boys behind the masked figures of Sphinx. They should not exist, yet they stand strong in a world of deception and secrets. The government is shattered by their inability to act."Sphinx" directly challenges the police, threatening to cause destruction and mayhem across Tokyo. The police struggle to act effectively against these terrorists, with Detective Kenjirou Shibazaki caught in the middle of it all.

Genre: Psychological, Thriller
Episodes: 11
Status: Completed
Other name: ZANKYOU NO TERROR

8. Garden of Sinners.

In September 1998, a string of seemingly random suicides leaves Japan baffled and devastated. A detective agency specializing in paranormal occurrences notices that there are a few glaring, disturbing similarities. All the victims are schoolgirls, and all of them have jumped to their deaths from atop the ancient Fujou Building. To investigate the cause of these disturbing events, the head of the agency, Touko Aozaki, dispatches Mikiya Kokutou and Shiki Ryougi. Shiki, who possesses the "Mystic Eyes of Death Perception": an abnormal ability that allows her to see, and bring, an end to all things.

Genre: Mystery
Episodes: 7
Status: Completed
Other name: 劇場版 空の境界 the Garden of sinners

 7. Paranoia Agents.

The infamous Shounen Bat is terrorizing the residents of Musashino City. His first victim, the well-known yet timid character designer Tsukiko Sagi. Detectives Keiichi Ikari and Mitsuhiro Maniwa begin to investigate the identity of the attacker. 

Genre: Drama, Mystery, Police, Psychological, Supernatural, Thriller
Episodes: 13
Status: Completed
Other name: Mousou Dairinin

 6. Death Parade.

After death, there is no heaven or hell, only a bar that stands between reincarnation and oblivion. There the attendant will, one after another, challenge pairs of the recently deceased to a random game in which their fate of either ascending into reincarnation or falling into the void will be wagered. Whether it's bowling, darts, air hockey, or anything in between, each person's true nature will be revealed in a ghastly parade of death and memories, dancing to the whims of the bar's master. Welcome to Quindecim, where Decim, arbiter of the afterlife, awaits!

Genre: Game, Psychological
Episodes: 12
Status: Completed
Other name: デス・パレード

 5. Steins; Gate.

The self-proclaimed mad scientist Rintarou Okabe with fellow lab members: Mayuri Shiina, his air-headed childhood friend, and Hashida Itaru, a perverted hacker nicknamed "Daru." rents out a room in a rickety old building in Akihabara, to make "future gadgets". 

Genre: Sci-Fi, Thriller
Episodes: 25
Status: Completed
Other name: シュタインズ・ゲート

4. When They Cry.

Rika Furude and her group of friends live in the small mountain village of Hinamizawa. Keiichi Maebara is a transfer student, making him the only boy in their group. Keiichi begins noticing strange behavior from his friends, who seem to be hiding the town's dark secrets from him. Elsewhere, a certain person watches these increasingly unsettling events unfold and remember all the times that this, and other similar stories, have played out.

Genre: Horror, Mystery, Psychological, Supernatural
Episodes: 25
Status: Completed
Other name: HIGURASHI NO NAKU KORO NI (2020)

3. The Promised Neverland.

The Grace Field House is inhabited by orphans happily living together as one big family, looked after by their "Mama," Isabella.  Although they are required to take tests daily, the children are free to spend their time as they see fit, usually playing outside, as long as they do not venture too far from the orphanage. However, all good times must come to an end, as every few months, a child is adopted and sent to live with their new family, never to be heard from again.

Genre: Horror, Mystery, Sci-Fi, Shounen
Episodes: 12
Status: Completed
Other name: The Promised Neverland

2. Death Note.

A shinigami, as a god of death, can kill any person—provided they see their victim's face and write their victim's name in a notebook called a Death Note. One day, Ryuk, bored by the shinigami lifestyle and interested in seeing how a human would use a Death Note, drops one into the human realm. High school student and prodigy Light Yagami stumble upon the Death Note. and—since he deplores the state of the world—tests the deadly notebook by writing a criminal's name in it. When the criminal

dies immediately following his experiment with the Death Note, Light is greatly surprised and quickly recognizes how devastating the power that has fallen into his hands could be.

Genre: Mystery, Police, Psychological, Supernatural, Thriller
Episodes: 37
Status: Completed
Other name: デスノート

 1. Monster.

Dr. Kenzou Tenma, an elite neurosurgeon. a seemingly small event changes Dr. Tenma's life forever. While preparing to perform surgery on someone, he gets a call from the hospital director telling him to switch patients and instead perform life-saving brain surgery on a famous performer. His fellow doctors, fiancée, and the hospital director applaud his accomplishment; but because of the switch, a poor immigrant worker is dead, causing Dr. Tenma to have a crisis of conscience. So when a

similar situation arises, Dr. Tenma stands his ground and chooses to perform surgery on the young boy Johan Liebert instead of the town's mayor. Unfortunately, this choice leads to serious ramifications for Dr. Tenma—losing his social standing being one of them.

Genre: Horror, Seinen, Thriller
Episodes: 74
Status: Completed
Other name: モンスター