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