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