Quote Originally Posted by Squall~Dissidia View Post
Sorry Yuki incorrect answer I put Disk 4 because on Disk 4 after Ultimecia's time compression you can get Ragnarok.
You actually get control of the Ragnarok the first time on disc 3 though after Squall and Rinoa come back from space. Pretty sure that is the first time that you gain control of the Ragnarok when you go to rescue Rinoa from being turned into a sorceress by Adel.