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