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