Here is the full list of all 54 Ys VIII: Lacrimosa of DANA VIII-Lacrimosa of DANA- achievements.
Completed every Castaway Village quest.
Cleared all Eternia Quests.
Defeated Melaiduma at the Former Sanctuary Crypt.
Passed the final trial, and learned the true history of the Kingdom of Eternia.
Achieved 100% Treasures Found.
Defeated Mephorash at the Silent Tower.
Cleared Epilogue - End of the Blue Waves, and viewed the true ending.
Cleared Chapter 6 - Lacrimosa of the Distant Sea.
Completed the map of the Isle of Seiren.
Thoroughly explored while playing as Sahad.
Achieved 100% Material Entries Logged.
Achieved 100% Meal Entries Logged.
Owned 888 of a single item.
Achieved a Reputation of 200 or more.
Brought all survivors to Castaway Village.
Achieved 100% Location Points Found.
Rescued every spirit in Eternia.
Fully enhanced all weapons.
Cleared Chapter 5 - Maiden of the Great Tree.
Defeated the Oceanus once and for all.
Cleared Baja Tower.
Performed 100 EXTRA Skills.
Defeated 100 Primordials.
Cleared Chapter 4 - The Lost World.
Cleared Chapter 3 - Surpassing Gendarme.
Traveled a total distance of 300 krimelye.
Performed 100 Flash Guards.
Thoroughly explored while playing as Laxia.
Cleared Chapter 2 - The Castaway Banquet.
Achieved an S Rank in any raid.
Thoroughly explored while playing as Adol.
Made it through the Eroded Valley.
Performed 100 Flash Moves.
Performed a Skill Finish 1000 times.
Performed 1000 Breaks.
Defeated 2000 beasts.
Made it through the Towering Coral Forest.
Enhanced a weapon to Lv. MAX.
Cleared Chapter 1 - The Isle of Seiren.
Cleared Prologue - Night on the Gaete Sea.
Began a new adventure.
Achieved 100% Items Collected.
Achieved 100% People Entries Logged.
Achieved 100% Fish Entries Logged.
Achieved 100% Beast Entries Logged.
Achieved 100% Village Fortifications Built.
Achieved 100% Approval Earned.
Completed all raids.
Completed all hunts.
Achieved Lv. MAX with every skill.
Thoroughly explored while playing as Hummel.
Thoroughly explored while playing as Ricotta.
Thoroughly explored while playing as Dana.
Witnessed the true ending on Nightmare difficulty or higher.