Here is the full list of all 167 Nusakana achievements.
Let the hold out soldier get beaten and captured by the villagers.
Fail at Kat's quiz.
Attain Narwhal's Ending.
Attain Orca's Ending.
Attain the special ending of two sisters.
Attain the special ending of two sisters with their mother safe.
Narwhal Max Affection.
Orca Max Affection.
Attain Azul / Ruvio's Ending.
Azul / Ruvio Max Affection.
Attain Coela's Ending.
Coela Max Affection.
Attain Mako's Ending.
Mako Max Affection.
Attain Eelia's Ending.
Eelia Max Affection.
Attain Molamola's Ending.
Molamola Max Affection.
Attain Arwana's Ending.
Arwana Max Affection.
Attain Rain's Ending.
Rain Max Affection.
Attain Pai's Ending.
Pai Max Affection.
Attain Angel's Ending.
Angel Max Affection.
Attain Mica's Ending.
Mica Max Affection.
Attain Pipi's Ending.
Pipi Max Affection.
Attain Kat's Ending.
Kat Max Affection.
Attain Auria's Ending.
Auria Max Affection.
Attain Sal's Ending.
Finish off the Elvan Empress.
Sal Max Affection.
Attain Gurami's Ending.
Gurami Max Affection.
Reach the year 1952.
Attain Delphi's Ending.
Delphi Max Affection.
Have a mention about this incident.
Catch all species of fish.
Catch all saltwater fishes.
Visit all of the sea fishing locations.
Attain Flily's Ending.
Clear the game in Normal Mode.
Achieve high enough affection with most of the maidens in one playthrough.
True ending.
Defeat the Elvan Armor and save the Elvan Empress.
Defeat Gelaf Ishkalie.
Defeat Brometheus.
Defeat Cahayya
Flily Max Affection
Defeat Barongsai.
Heed Gurami's advice and don't enter the gate.
Explore all the island zones.
Accumulate 900,000 Sh.
Catch all freshwater fishes.
Bring at least one adult party member when peeking at the onsen.
Succesfully peek on the girls at the onsen.
Bring party member but no adults when peeking at the onsen.
Unlock all of the hotspring scenes.
Accumulate 500,000 Sh.
Unfortunately end your adventure in Extreme Mode.
Learn all available magics.
Achieve maximum affection with the Syldarians.
Accumulate 200,000 Sh.
Defeat Lyishtrik
Craft all gears from Havel.
Learn all of the knife skills.
Achieve maximum affection with the Kilferns.
Learn all of the sword skills.
Catch the Oarfish.
Collect 99 Mangoes.
Craft all available foods.
Help Riri against her brother.
Don't help Riri against her brother.
Achieve maximum affection with the Tourists.
Defeat Hulhiru.
Learn all weather magics.
Learn all of the knuckle skills.
Defeat the Babi Ngepet.
Defeat Garnishun.
Report the smuggler to the village.
Let the smuggler have the rhino horn.
Defeat the Ahool.
Defeat the Umibozu.
Defeat Hamune.
Collect all guns available.
Collect all knives available.
Recruit all of the maidens.
Recruit Coela to your party.
Learn all of the gun skills.
Defeat the Nightwalker.
Appease the night walker with the sajen.
Collect all knuckles available.
Help Aslan and Angel meet each other to resolve their past promise.
Place all the beacons.
Meet Arinka's family.
Achieve maximum affection with the Nusakanans.
Have Narwhal, Pipi, and Angel in your party.
Fix the Lighthouse of Lighthouse Island.
Equip sunglasses and nusakanan aloha shirt at the same time.
Recruit Delphi to your party.
Have met Mako before she kidnap Delphi.
Recruit Rain to your party.
Recruit Eelia to your party.
Defeat Rabboss.
Recruit Angel to your party.
Defeat Genderuwo.
Caught a Marlin.
Camp together with Pipi, Kat, and Mica.
Recruit Pipi to your party.
Recruit Pai to your party.
Recruit Mica to your party.
Give him something more sane instead of that stupid gift.
Give the dude what he wants...
Recruit Mako to your party.
Recruit Azul/Ruvio to your party.
Collect all bomb types.
Win the hide and seek game with Mica and her friends.
Leave Mica and her friends while playing hide and seek with them.
Finish the Missing Chief III.
Recruit Flily to your party.
Recruit Narwhal to your party.
Successfully peek on the girls bathing at the the waterfall.
Refuse to participate on peeking the girls bathing at the waterfall.
Bring a party member when peeking at the waterfall.
Recruit Gurami to your party.
Defeat Garnishun at your first encounter.
Recruit Arwana to your party.
Finish the Missing Chief II.
Catch the Beluga Sturgeon
Defeat Hamune at your first encounter.
Recruit Sal to your party.
Get beaten by Sal at the duel.
Recruit Orca to your party.
Save Bondan all the time from his peril.
Collect all the guide books.
Recruit Kat to your party.
Beat Kat's quiz on the first try.
Caught a Manta Ray.
Store 99 brown matters in your inventory.
Release a rare fish.
Let the hold out soldier escape from the villagers' anger.
Recruit Auria to your party.
Keep a fish.
Release a fish.
Recruit Molamola to your party.
Finish the Missing Chief I.
Complete the Encyclopedia.
Leave Nusakana without memorable adventures.
Collect all swords available.
Catch 99 Tenggiris.
Catch 88 Lou Hans.
Catch 99 Sturgeons.
Catch 99 Oarfishes.
Catch 99 Paris.
Have 99 caviars in your inventory.
Beat Sal at the duel barehanded.
Have Mako disrupt you in your adventure to the Evermist Trench with Brometheus.
Achieve True Ending in Easy Mode.
Clear the game in Easy Mode.
Clear the game in Classic Mode.
Clear the game in Extreme Mode.