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