In addition to improved graphics, a new first-person mode, and support for up to 8K resolutions, it seems that the definitive version of Final Fantasy 15 is actually far easier to develop than its console counterpart. According to Hajime Tabata, Director of the upcoming game, creating a Final Fantasy experience on PC is "more than 100 times" easier than initial development was when the game had to be made from scratch.
Final Fantasy 15 PC Development ‘100 Times’ Easier Than Console, Says Director
Sign in to your The Best War Games account