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