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