Here is the full list of all 56 DISSIDIA FINAL FANTASY NT Free Edition achievements.
Received a grade of A++ in three ranked matches as Onion Knight.
Defeated an enemy at max HP with a single attack fifty times in ranked matches.
Received a grade of A++ in three ranked matches as the Emperor.
Received a grade of A++ in three ranked matches as Sephiroth.
Defeated three opponents by yourself in a single ranked match fifteen times.
Received a grade of A++ in three ranked matches as Cloud.
Received a grade of A++ in three ranked matches as Cecil.
Received a grade of A++ in three ranked matches as Cloud of Darkness.
Received a grade of A++ in three ranked matches as Firion.
Won ten ranked matches.
Received a grade of A++ in three ranked matches as Garland.
Received a grade of A++ in three ranked matches as Warrior of Light.
Received a grade of A++ in three ranked matches as Bartz.
Completed Story Trial IV in gauntlet mode.
Obtained all the EX skills and summons.
Expended twenty memoria in story mode.
Completed Story Trial II in gauntlet mode.
Expended fifteen memoria in story mode.
Completed Story Trial I in gauntlet mode.
Expended ten memoria in story mode.
Expended five memoria in story mode.
Completed the Basic Trial in gauntlet mode.
Unlocked all achievements.
Expended twenty-five memoria in story mode.
Expended all memoria in story mode.
Defeated all the summons and Shinryu on Hard difficulty.
Claimed treasure one hundred times.
Claimed treasure three hundred times.
Completed Story Trial III in gauntlet mode.
Completed Story Trial V in gauntlet mode.
Completed the Summon Trial in gauntlet mode.
Obtained ten titles within the game.
Obtained fifty titles within the game.
Won one hundred ranked matches.
Won three hundred ranked matches.
Won thirty ranked matches without taking HP damage.
Interrupted five enemy attacks in a single ranked match thirty times.
Destroyed fifty summoning cores by yourself in ranked matches.
Received a grade of A++ in three ranked matches as Kain.
Received a grade of A++ in three ranked matches as Golbez.
Received a grade of A++ in three ranked matches as Exdeath.
Received a grade of A++ in three ranked matches as Terra.
Received a grade of A++ in three ranked matches as Kefka.
Received a grade of A++ in three ranked matches as Squall.
Received a grade of A++ in three ranked matches as Ultimecia.
Received a grade of A++ in three ranked matches as Zidane.
Received a grade of A++ in three ranked matches as Kuja.
Received a grade of A++ in three ranked matches as Tidus.
Received a grade of A++ in three ranked matches as Jecht.
Received a grade of A++ in three ranked matches as Shantotto.
Received a grade of A++ in three ranked matches as Vaan.
Received a grade of A++ in three ranked matches as Lightning.
Received a grade of A++ in three ranked matches as Y'shtola.
Received a grade of A++ in three ranked matches as Noctis.
Received a grade of A++ in three ranked matches as Ramza.
Received a grade of A++ in three ranked matches as Ace.