Square Enix going to held a free login period in the Final Fantasy XIV MMORPG game but only for the PlayStation 3 users in Japan. You can login and play for FREE with the game between May 1 and June 15, 2017.
It should be noted that the PlayStation 3 version Final Fantasy XIV service will be terminated within this period and after that you have to upgrade to the PlayStation 4 version of the game if you want to continue without any restart (data move).
You can do it until December 31, 2017. If you move now to the PlayStation 4 version you CAN NOT play for free in this free login period.
Here you can read more about the free login campaign: http://sqex.to/a6G and here you can find more details about the migration to the PS4 edition of the game: http://sqex.to/Eds