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