Hunter × Hunter: Phantom Rouge
"Hunter × Hunter" creator Yoshihiro Togashi wrote the two-part manga to act as a prequel to the film. A collected version of the story, referred to as "Volume 0" of the series, was given to the first million moviegoers. A light novel adaptation of the film was released by Shueisha on January 15, 2013.
Dia Horizon
"Dia Horizon" was announced by Square Enix as a "mixed media project" in July 2017. The smartphone game was released on Android and iOS devices in Japan on August 24, 2017, and an anime television series aired in Japan from October to December 2017. A 4-panel manga adaptation is serialized online via the official Dia Horizon website. Another manga series is serialized online via Square Enix's digital publication "Manga UP!" beginning from August 7, 2017. A novel written by Ghost Mikawa, titled "Dia Horizon: Akatsuki no Keiyakusha", was serialized online via Kadokawa's Kakuyomu website. The game was discontinued on May 31, 2018, along with "King's Knight", another Square Enix fantasy mobile game.