An entry in the Tales of... series for the Nintendo DS, but was not directly developed by Namco. Due to the game's very poor reception, Tempest was shifted from a "mothership" title and made into the very first "escort" title, dividing the series between the main series and spinoffs/sequels. Even so, Tempest's spirit lives on thanks to the two main protagonists Caius and Rubia appearing in side material and in Radiant Mythology. Rubia also appears as a support character in Tales of Hearts.
This tag implicates tales_of_(series) (learn more).