Square Enix appears to be covering its bases related to games with Mind as a prefix. As Siliconera notes, the company previously trademarked Mindhack in Europe and now has done the same for Mindjack in the region. Reportedly the major difference between the two trademarks is that Mindjack specifically mentions use in online video games.
We're following up with Square Enix, but with E3 so close now, the company is probably stuffing its corporate press release piñata for the event. Perhaps the Mind- games will be stuffed in there with Final Fantasy: The 4 Heroes of Light details.