Hi

In the main series is there a specific challenge in each game that is considered the toughest challenge you can take on?

I'm not interested in 100% completion, just a tough play through where you have to take on all bosses, optional monsters and superbosses.

I saw one in a Final Fantasy 1 forum where you had to pick a random party, and you couldn't revive dead party members, or reload if something happens that you don't like.

After seeing that I became curious to see if there was a similar tough challenge in each of the games that I could take on.

It would give a great excuse to back through the series again, after I beat them all playing them the standard way.