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