If you're looking for manga similar to Rengoku Game, you might like these titles.
In the depths of the Magamaga Mountain range, dark, mysterious and foul events befall upon those who enter.
A collection of stories in genres ranging from supernatural, to horror, to more typical mysteries -- all with a gothic, psychological air to them. Adaptations of renowned 20th century Japanese author Edogawa Ranpo's works.
The "dramatic bio horror" manga is set in a world where a new disease is spreading through humanity, one which turns humans into amoebas and slime molds when they are too stressed. Whether someone lives or dies during the process is a roll of the dice.
Three years ago, a deadly accident forced the closure of Cofdeece, a residential and scientific facility located 6,000 meters beneath the ocean. Now, Kengo Kadokura has been sent to the newly-reopened underwater structure by its new corporate owners, and alongside other engineers, doctors and workers, he will assist with the reconstruction efforts. But when the body count begins to rise, the crew soon realizes that there's more going on at Cofdeece than meets the eye...
Tokyo, 1952. A beautiful, mysterious women who's haunted by dark dreams claims to have murdered her ex-husband... three times. Meanwhile, a small seaside town is terrorized by a bizarre series of deaths. Four seemingly separate murders are linked by strange, unsettling dreams of bones... Is something supernatural going on, or are the real demons found in the depths of the human mind?
The students of Kamishiro High-School Class 2-A swore revenge on their homeroom teacher, Takao Nanami. Against her, a fake suicide had been concerted, meant to be played out by one of her students, whose actual death would later sink the class into confusion. Who soiled the water with blood? Skinned of its trust, their friendship became an urge to sate each other’s hunger.
Katsuragi Shiho casually handed her house key to Shikibu before leaving her hometown. After not returning on the third day as she had promised, Shikibu probes around and finds a lead that brings him to "Yasha Island". However, the strange rituals being held on the island, Shikibu's investigation records getting stolen, and finding Katsuragi's name in the house of blood among other mysterious occurences all point to Katsuragi having vanished into thin air! Shikibu is bent on finding out the truth, but the islanders all seem to have been silenced by somebody...?!