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