The project is in development for the Mobage platform, a gaming network for Android and iOS users, reports GI.biz.
Square has yet to announce full details of the game, but pre-registrations are being accepted. Owners of the PSP-exclusive Final Fantasy Type-0 will be handed an in-game reward.
The studio has released two Final Fantasy-themed Facebook titles in the past, Knights of the Crystals and Chocobo's Crystal Tower. The new venture will focus on team-based battles and will be the first social game to use the franchise's branding.
DeNA previously announced that Keiji Inafune, Grasshopper Manufacture, Prope, Meister and Marvellous Entertainment also have projects in development for its Mobage platform.
A release date for the social Final Fantasy is yet to be confirmed.
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