yeah it was to get people ready for the story of the "Tales of" game "Tales of Zestiria" and it's an amazing game just as all of their games
I really recommend them
But normally they don't make an anime about those games, only an episode....
BUT YOU'RE IN LUCK, they made an anime about it "Tales of Zestiria X"
I haven't seen it up to date yet (and it starts completely differently from the game and the episode you saw) but personally if you want to watch it for the story I recommend you watch a playthrough of the game
But if you really want watch it, then here's a link
(http://kissanime.to/Anime/Tales-of-Zestiria-the-X-Cross)
Wroden's post in Identify anime - adopted by seraphim was marked as the answer