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