Description:

Handsome and effeminate, quiet but proud, the sinister Akito Kobayashi has a passion for the occult and has developed a computer program to summon demons and the living dead. But little does he know that fellow high school students Kojirou Souma and Saki Yagami are reincarnations of powerful and benevolent spirits. When the pair's friends have become targeted by demons trying to harvest their life energies, they must harness their dark metaphysical powers to destroy Kobayashi's threatening program, or risk losing their loved ones forever. [Written by MAL Rewrite]

Description:

Yuugi is a somewhat frail young boy who happens to be a big fan of gaming of any kind. But when he solves an ancient egyptian puzzle he is granted all the powers of darkness. Now when confronted with danger and injustice, he transforms into a much darker and dangerous form, and proceeds to dish out the justice and punishment for those who so richly deserve it. (Source: AnimeNfo)

Description:

Have you heard of Jigoku Tsuushin (Hell Correspondence)? Those with a powerful grudge may only access this mysterious website at midnight, allowing them to enter anyone's name and have that person be ferried straight to hell. Ai Enma, the Hell Girl, will not judge whether or not the chosen target deserves punishment; she will merely exact revenge on them for you, provided your pain or suffering move her. Not much is known about this young girl other than that she swiftly carries out her tasks with the help of three straw dolls. There is just one catch, however—as payment for carrying out such a request, the user must condemn themselves to an afterlife in hell. [Written by MAL Rewrite]

Description:

The World as we know it has been torn apart shattered by a series of natural disasters that have turned civilization into a brutish nightmare of survival and has left whole cities buried beneath the Earth. It's now a lethal and chaotic place, a place where only the strongest and most savage remain alive. The strongest of them all is a giant warrior known as Violence Jack… Violence Jack tries to avert a civil war brewing among the wretched inhabitants of a subterranean metropolis called Evil Town. Based on a character created by manga horror specialist, Go Nagai. (Source: AniDB)

Description:

When an evil sorcerer bent on crushing the "greatest city on earth" uses dark powers to awaken the destructive spirit of Tokyo's historic "guardian", Taira no Masakado, occultists, children and scientists become embroiled in a ruinous struggle spanning two decades. (Source: ANN)