Gate of Nightmares is a mobile RPG that had Fairy Tail and EDENS ZERO creator Hiro Mashima teaming up with Square Enix, scenario writer Jin Fujisawa (Dragon Quest IX: Sentinels of the Starry Skies), and composer Yasuharu Takanashi (Fairy Tail).
Credit for the original work goes to Square Enix and Hiro Mashima—who provided character designs and world-building for the project—and and the manga itself will be illustrated by Yoshinori Matsuoka.
The game originally launched in Japan on October 26, and now it has a manga adaptation on the way.