Here is the full list of all 52 Ys: Memories of Celceta achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Acquired all achievements.
Played extensively as Calilica.
Mastered every skill.
Acquired at least one of every item.
Filled out all material details in journal.
Amassed one million gold.
Purchased every piece of info from Mouse.
Cleared all obstructed paths.
Endured all of Zara's tickle sessions.
Played extensively as Ozma.
Befriended all animals.
Proved your skill as a merchant.
Played extensively as Karna.
Played extensively as Duren.
Defeated a boss in Time Attack without taking damage.
Conquered Boss Rush.
Conquered Boss Rush without a single retry.
Defeated a boss in Time Attack in thirty seconds or less.
Restored all lost memories.
Completed the main story.
Cleared the game on Nightmare difficulty.
Filled out all monster details in journal.
Overcame Gruda's trial.
Opened every treasure chest.
Defeated the ruler of the Great Forest.
Enhanced a weapon or armor to its limit.
Discovered every resource point.
Completed the Map of Celceta.
Opened the door to the Temple of the Sun.
Successfully completed every quest.
Acquired both halves of the Mask of the Moon.
Played extensively as Frieda.
Defeated a rare golden foe.
Found all of Mishy's hiding spots.
Arrived in the ruined capital, Elduke.
Located the underground village of Danan.
Reunited with Eldeel at the Tower of Providence.
Walked an extraordinary total distance.
Defeated two thousand enemies.
Successfully arrived in the Primeval Lands.
Defeated Duren in one-on-one combat.
Solved the mystery of the missing villagers.
Achieved one thousand Aerial Combos.
Achieved five hundred Skill Finishes.
Successfully used Flash Move fifty times.
Achieved five hundred Excellent Kills.
Resolved the polluted river dilemma.
Successfully used Flash Guard fifty times.
Discovered a settlement in the Great Forest.
Played extensively as Adol.
Successfully rescued the trapped miners.
Began your adventure in Celceta.