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