Nightmare Game

is a Japanese light novel series written by Masaru Masaka, with illustrations by Akinosora. The series began publication on August 10, 2018 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
When I woke up, the city was covered with [Nightmare] ... A local city where nightmares broke through people and began to attack.

At the end of the sprouting nightmare, once captured by its existence, it runs wild and does not stop until the human dies.

Lost memories, closed towns, tears of my childhood friends, cult religions that follow strange prophecies-at the mercy of mysterious situations, I just rely on the sword I have in my hand to survive.

What is the cruel "truth" that goes beyond many deaths and waits ahead of the wounds?

Is there an end to this nightmare?