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