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