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