I think FF Origins is the last version of FF1 that existed before they butchered the challenge into non-existence with Dawn of Souls, and that PSP copies Dawn of Souls, but I'm not confident about that. Someone may want to correct me.
Of course if the games being dirt easy isn't an issue for you there's nothing wrong with a Dawn of Souls type experience for the games (it's not unplayable or anything), I just think that misses the point myself.
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