The official website for Kadokawa's Fantasia Re:Build crossover game revealed on September 30 that the game will end service on December 17.
The game debuted on December 17, 2020 for iOS and Android devices, as well as the DMM Games platform.
The crossover game features characters from various light novel series under Kadokawa's Fantasia Bunko imprint, including:
Saenai Heroine no Sodate-kata (Saekano: How to Raise a Boring Girlfriend) Sky Wizards Academy Chrome Shelled Regios The Slayers AntiMagic Academy "The 35th Test Platoon" The Legend of the Legendary Heroes Date A Live Tokyo Ravens Chaika the Coffin Princess Gamers! High School DxD Full Metal Panic! Akashic Records of Bastard Magic Instructor
Koushi Tachibana (Date A Live) is credited with the overall structure and world building of the game, while Kurone Mishima (Akashic Records of Bastard Magic Instructor) drafted the original character designs. Kanetake Ebikawa (Full Metal Panic! mecha designer) collaborated on designs. Sekina Aoi (Gamers!), Ichiei Ishibumi (High School DxD), Koushi Tachibana, and Tarō Hitsuji (Akashic Records of Bastard Magic Instructor) are all credited for the main scenario writing. DMM Games and gumi developed the game.
Kadokawa announced the game in 2018.
Sources: Fantasia Re:Build game's website via Otakomu