Plus, neither of these remakes have been released on other platforms, making them difficult to enjoy on modern hardware. Considering the original FF is already light on plot and characterization, challenging combat should be the game's main attraction. But they also replace FF's spell system with an MP-based magic system, and reduce the difficulty across the board. What about the rest? Final Fantasy 1 & 2: Dawn of Souls (GBA) and Final Fantasy (PSP/Mobile) are both solid remakes with all the updates found in the PS1 version, plus some new dungeons and other extras.
And, because Origins was released on PSN in 2011, the game is very easy to find and play on your PS3 or Vita.
Origins also has redrawn sprites, a remixed soundtrack, a revised script, and some bug fixes that together make it a clear upgrade to the NES classic. Should you find the game too tough, there's also the option for easy mode (which is made mandatory in later remakes). Unlike other remakes, Origins remains faithful to its namesake by retaining FF's unique spell system and difficulty curve.
The definitive version: Final Fantasy Origins (PS1) It's the perfect blend of classic difficulty and modern presentation.