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