Crystal Defenders (クリスタル・ディフェンダーズ, Kurisutaru Difendāzu) is a series of turn-based strategy video games developed by MSF/Winds and published by Square Enix. It comprises several iterations released for mobile phones and through online video game delivery services. The games are set in the fictional world of Ivalice
and features job classes, monsters and summoned creatures from the tactical role-playing game Final Fantasy Tactics
. It, therefore, is part of the Eye-Stabbingly Popular Final Fantasy
Franchise in a roundabout sort of way.