In order to play FINAL FANTASY XIV: A Realm Reborn, you'll first need to enter your promotion code, kupo.
Where do I get the promotion code?
It's printed inside the game manual that came with your package, kupo. Log in to PlayStation®Store and you can enter it there.
The promotion code is a 12-character alphanumeric code printed on the game manual enclosed in the package for FINAL FANTASY XIV. Please note that promotion codes cannot be reissued in the event they are lost or stolen.
Once you're finished with the promotion code, place the game disc in your console, then select FINAL FANTASY XIV: A Realm Reborn on the home screen (PlayStation®4) or the Game menu of the XrossMediaBar (PlayStation®3). After that, the game will install automatically, kupo.
Wow, that was pretty easy.
Why wouldn't it be, kupo?
Anyhow, when the installation is done, you'll be ready for registration.