Here is the full list of all 49 WORLD OF FINAL FANTASY achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Obtained every achievement.
Defeated many foes using any Magitek armor.
Recorded every last Mirage in the Mirage Manual.
Opened every last treasure chest.
Mastered 100 Mirage Boards.
Cleared the sky of uncountable einhänders.
Reached the final chamber of the Nether Nebula in record time.
Thwacked a whole bunch of cactuars in a single thrashing.
Defeated the Cogna known as XG.
Braved and completed the new dungeons that appeared.
Defeated the Quacho Queen with one of Lann’s attacks.
Defeated every last opponent in the Coliseum.
Defeated the Undead Princess 10 times.
Defeated the Princess Goblin with the Warrior of Light.
Defeated every last murkrift Mirage.
Found the secret area in every dungeon.
Fulfilled the requests of every last townsperson in need.
Recorded an inconceivable number of Mirages in the Mirage Manual.
Added Tamamohimé to your roster.
Reached the true ending.
Completed every last intervention battle.
Brought all seven of the Pleiad back in line.
Joined forces with Shivalry to defeat the Golden Flan.
Reached an ending.
Defeated 30 teams at the Coliseum.
Defeated Ultros in Tometown.
Chastised the fugitive Ifreeta.
Completed 30 intervention battles.
Learned the location of Castle Exnine.
Teamed up with Gilgamesh to stop the Bahamutian soldier.
Obtained every last Champion Medal.
Found all of the keys from the Crimson Prophecy.
Battled 500 times.
Recorded a huge number of Mirages in the Mirage Manual.
Completed 10 intervention battles.
Mastered your first Mirage Board.
Opened 100 treasure chests.
Got to the bottom of the “phenomenon” at the Coliseum.
Found the first key from the Crimson Prophecy.
Recorded a large number of Mirages in the Mirage Manual.
Battled 100 times.
Completed your first intervention battle.
Obtained your first Champion Medal.
Defeated your first murkrift Mirage.
Won your first Coliseum battle.
Repelled the Bahamutian Army.
Fulfilled a townsperson’s request for the first time.
Imprismed your first Mirage.
Arrived in Grymoire.