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