GuessAnime.

10. Jagaaan

Shintarou Jagasaki, who is a neighborhood police officer, lives with his girlfriend while working a job that is killing him slowly with annoyance. It looks like he will end up marrying soon and live a boring life with a nuclear family—a grim future for a guy with dreams! One such day, a mysterious monster appeared on the train and he suddenly can shoot with his right hand like Master Buppanatsu, the eggplant mascot of his city!

Jagaaan is finished and has 14 Volumes and 163 Chapters. It is also Known as: ジャガーン, Jagaaan

9. Yuureitou

In the 1950s, an old woman was brutally murdered on the face of a clock tower by her adopted daughter. Two years later, the clock tower is known as the 'ghost tower' and it is supposedly haunted. Through an unusual series of events, a young NEET man named Amano Taichi is attacked by someone or something in the same clock tower, and finds himself bound to the clock face to be killed in the same way as the old woman. Luckily for Amano, he doesn't meet the same fate. He's rescued by a mysterious person who claims his name is Tetsuo.

Yuureitou is finished and has 9 Volumes and 80 Chapters. It is also Known as: 幽麗塔, The Ghost Tower

8. Bastard

There is a serial killer in my house!

Bastard is finished and has 5 Volumes and 94 Chapters. It is also Known as: Bastard

7. Heads

This manga is a story based on a thriller by Keigo Higashino. The main protagonist, the shy Jun Naruse, is a rather average guy who works for a electronic company and loves to draw. He falls in love with Megumi whom he met at a shop selling drawing materials and an intimate relationship develops. A few days later the office gets attacked and when the criminal tries to shot a little girl he saves her by jumping in front of her.

A month pasts until he wakes up again and is told that half his brain got destroyed and he only survived because someone donated half a brain. Everything seems to be fine, he quickly recovers and is happy, however he begins to change...is the donated brain the reason for that? Or is it just a side effect of the medicine?

Heads is finished and has 4 Volumes and 36 Chapters. It is also Known as: ヘッズ, Heads

6. Chi no Wadachi

The illusion of that person leads me astray. Mother and son. This is the ultimate favoritism.

Blood on the Tracks is finished and has 17 Volumes and 153 Chapters. It is also Known as: 血の轍, A Trail of Blood

5. Ajin

Ajin are humans that cannot die. Seventeen years ago, they first appeared on a battlefield in Africa. From then on, more of their kind are discovered within the human society. Their rarity in appearance means that, for experimental purposes, the government will generously reward anyone who captures one. In the present day, for what a certain high school student expects to be a typical summer holiday, his life is about to turn unexpected...

Ajin: Demi-Human is finished and has 17 Volumes and 86 Chapters. It is also Known as: 亜人, Ajin

4. Imawa no Kuni no Alice

Alice Ryouhei will leave high school soon, but he's trying to avoid thinking about his future. Late one night, when he's hanging out with his tough friend Karube and his silly, girl-crazy friend Chota, they see fireworks. After one blindingly bright explosion, they find themselves waking up in a different world. In this "Borderland," people are forced to either participate in potentially deadly games or simply die. Will Chota, Karube, and Ryouhei be able to survive this dangerous new world, and is there a way they can get back to their original lives?

Alice in Borderland is finished and has 18 Volumes and 87 Chapters. It is also Known as: 今際の国のアリス, Imawa no Kuni no Alice

3. Gantz

Thought your life was bad? Sometimes, death is worse. There is no salvation, peace, nor god waiting to receive you into their care. But wait, a god? Maybe you are talking about that big black ball stuck in the room with you. Now you are thrown into a game, fighting green aliens and robot monsters for the chance to survive.

When Kei Kurono is killed, he thus finds himself caught in such a game; a test of his skills, morals and will to survive. His life is not his own, his death spat and trampled upon over and over again. What happens if he does not listen? God knows.

A word of warning: Gantz is not for the faint-hearted, but neither is it as simple as it looks. Gore, rape and violence is rampant, as are portrayals of greed, violence, and all the ugliness that one sees in society today.

Gantz is finished and has 37 Volumes and 383 Chapters. It is also Known as: GANTZ, Gantz/Osaka

2. Amon: Devilman Mokushiroku

Fear runs rampant throughout Tokyo with the revelation that demons in fact exist amongst us. Paranoia and the darker side of humanity boils onto the streets as people turn on one another, suspecting that anyone could in fact be a demon hiding in human clothing. Amidst the growing tensions, tragedy strikes Akira causing his mind to snap, retreating into his subconscious, allowing his Devilish alter-ego Amon to break free from Akira's cage of flesh and wreak havoc on both human and demons alike.

Amon: The Darkside of The Devilman is a re-imagining of the last chapters of the original Devilman manga. Where in the original, Devilman faces Satan after seeing the slain friend Miki Makimura's decapitated head, Amon sees Akira lose control of himself, and due to his sadness and depression from not being able to protect Miki, allows Amon to gain control of Akira, and his powers again.

Amon: Devilman Mokushiroku is finished and has 6 Volumes and 41 Chapters. It is also Known as: AMONデビルマン黙示録, Amon: Devilman Mokushiroku