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