If any video game franchise has proven itself to be open to change, it's Final Fantasy. The long-running JRPG series from Square-Enix has reinvented itself numerous times, changing with the times and often innovating with new technology that the rest of the genre has to keep pace with. And, with the number of Final Fantasy games that exist, it stands to reason that a few of them have altered the course of the franchise in some pretty significant ways.