The well-regarded second (Western) entry in the Final Fantasy game series, Final Fantasy IV, will arrive on the iOS platform on December 20, in time to celebrate the series' 25th anniversary. Creator Square Enix already has a number of Final Fantasy games available for iOS, but Final Fantasy IV is particularly fondly remembered as a landmark of the series that introduced a number of concepts and characters, along with an involved plot and high-quality music score that resonated with players. To celebrate, a rare sale on the other FF titles is currently underway.