Here is the full list of all 83 STRANGER OF PARADISE FINAL FANTASY ORIGIN achievements.
Acquired all achievements.
Completed "Illusion at Journey's End."
Completed "The Journey Begins."
Completed "Audience with the Dark Elf."
Completed "Natural Distortion."
Completed "A Familiar Place."
Completed "Memories of Wind."
Completed "Memories of Poison."
Completed "Memories of Fire."
Completed "Phantoms of the Past."
Completed "Memories of Earth."
Completed "To Remember."
Completed "Memories of Water."
Completed "Schemes of the Past."
Completed "Remembering Home."
Completed "The Suffering of Fools."
Completed "A Fraught Journey."
Completed the game on CHAOS difficulty.
Completed a level 200 mission or higher on CHAOS difficulty.
Completed a side mission.
Completed every side mission.
Used soul burst for the first time.
Used a weapon ability for the first time.
Defeated a cactuar.
Defeated a tonberry.
Acquired an anima shard.
Acquired an anima crystal.
Acquired an artifact.
Used a job crest at the smithy.
Fully upgraded the special effect of a piece of equipment.
Unlocked every job affinity bonus for a single job.
Unlocked every panel in the job tree for a single job.
Used a master point.
Achieved MASTER★★★★ rank for a job.
Unlocked an advanced job.
Unlocked all jobs.
Unlocked the dark knight.
Unlocked the paladin.
Unlocked the ninja.
Unlocked the assassin.
Unlocked the liberator.
Unlocked the breaker.
Unlocked the void knight.
Unlocked the tyrant.
Unlocked the sage.
Unlocked the cyclic warrior.
Completed the mission "Light of Possibility."
Completed the mission "Cornelia's Hope."
Completed the additional mission: "Ebon Memories: Hope Within Despair."
Talked to Bahamut via Conversations with Bahamut.
Completed a mission with a dragon king trial enabled.
Acquired a rat tail.
Equipped a ★4 or better accessory.
Equipped a staff.
Unlocked the class tree.
Unlocked the entirety of the evocation or ultima tree for any job.
Unlocked the summoner.
Unlocked the evoker.
Completed a floor of the rift labyrinth.
Completed over thirty rift labyrinth floors.
Summoned your first monster.
Maxed out your affinity with the Tonberry Blacksmith.
Maxed out your affinity with the discarded organic reconnaissance unit.
Received an accessory from Gilgamesh.
Obtained a relic with blessings from 12 different summons.
Used dimension bringer.
Gave an elixir to a magic pot.
Encountered a chaos event.
Unlocked the blue mage.
Completed the additional mission: "Chaos Rift - Battle on the Big Bridge."
Defeated a death machine in the rift labyrinth.
Equipped a gun.
Unlocked every panel in the marksman job tree.
Unlocked the hunter.
Unlocked the gambler.
Defeated a manikin.
Acquired Garland's armor.
Used replication at the blacksmith for the first time.
Completed the additional mission "Distant Memories: Supreme Illusions."
Defeated the Transcendent.
Defeated From Hell Risen.
Defeated Light of Order.
Defeated Jack Garland.