Sony’s list of games that it will exhibit at Tokyo Game Show 2018 is listing Kadokawa Games’ √Letter Last Answer project as a PlayStation 4 and PlayStation Vita title.
The √Letter (pronounced “Root Letter”) mystery visual novel shipped in June 2016 in Japan for the PlayStation 4 and PlayStation Vita.
Kadokawa Games announced the project in August, but did not announce the format.
Kadokawa Games released the game on PC via Steam in July 2017 and for iOS and Android in August 2017.