Here is the full list of all 48 The Adventure of NAYU achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Visit 50 areas.
Release all outfits.
Collect 47 achievement stamps.
Release the ninja outfit.
Release the witch's outfit.
Release the spearman outfit.
Release the cook's outfit.
Unlock 35 items from Lugh's information shop.
Knock down 3 GuBee's kings.
Defeat the GuBee's King.
Knock down 20 boss-level monsters.
Maximum damage exceeds 99999.
Unlock 21 items from Lugh's information shop.
Increase the adventurer level to 300.
Increase the adventurer level to 200.
Visit 25 areas.
Maximum damage exceeds 9999.
Collect a cumulative total of 10000 shards of stars.
Collect a cumulative total of 100000 shards of stars.
Knock down 100 monsters.
Increase the adventurer level to 100.
Unlock 7 items from Lugh's information shop.
Collect 50 pieces of cheese.
Start endless mode
Complete the story
Update your high score on the Road to Cheese.
Collect 10 pieces of cheese.
Collect 30 pieces of cheese.
Collect 23 achievement stamps.
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Discovering the Forgotten Forgotten capital.
Go into fever mode 10 times.
Defeat the cave boss.
Knock down 50 monsters.
Strike 300 times.
Encounter the researcher in the cave.
Activate the game for 60 minutes.
Meet Suzu and become friends.
Out of the woods.
Defeat Rye in the woods.
Defeat Lev in the woods.
Defeat the bear in the meadow.
Activate the game for 30 minutes.
Clear the first area of the story.
Got your first shards of the star.
First time in fever state.
Activate the game for 15 minutes.