Last week, Square Enix updated its MMO Final Fantasy XIV: A Realm Reborn with the v2.3 patch, Defenders of Eorzea. To celebrate the new features, users can sign in for free all weekend until midnight on July 20, Pacific time (that's 3:00 AM Monday morning for players on the East Coast). To be eligible, you'll have to have previously purchased and registered a copy of the game and your service account must be inactive during the promo.