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