Sure looks like it! Square Enix recently trademarked Mindhack in Europe for use with video games, jigsaw puzzles, and inflatable toys. Just guessing here, but Square Enix’s primary business is video games so we’re going with the first option.
Also related are a bunch of web registrations made by Square Enix Europe for mindhackgame.com, mindhackthegame.com, and mindhack-game.com. While this sounds like it could be related to Deus Ex or another Eidos project, Square Enix Japan filed the Mindhack. Square Enix Ltd., their European office, handles Eidos registrations such as Deus Ex: Human Revolution, which was also brought to public attention via a trademark we found.