 The sourcebooks of Seven Fortress's campaign settings

Unlike most Japanese urban action RPGs, the game focuses on dungeon play.This is because the RPG which the game is based on, "Seven Fortress", was also heavily focused on dungeons, but the game is designed so that dungeons can be readied even in a modern-day setting, which is considered the strongpoint of the game to this date.The rule books and other contents are only released in Japanese language.