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.
Collect 50 pieces of cheese.
Collect 47 achievement stamps.
Unlock 35 items from Lugh's information shop.
Visit 50 areas.
Unlock 21 items from Lugh's information shop.
Defeat the GuBee's King.
Knock down 3 GuBee's kings.
Knock down 20 boss-level monsters.
Maximum damage exceeds 99999.
Increase the adventurer level to 300.
Go into fever mode 10 times.
Maximum damage exceeds 9999.
Release the cook's outfit.
Release the spearman outfit.
Release all outfits.
Release the ninja outfit.
Visit 25 areas.
Increase the adventurer level to 200.
Release the witch's outfit.
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.
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.
Activate the game for 60 minutes.
Defeat the cave boss.
Discovering the Forgotten Forgotten capital.
Knock down 50 monsters.
Activate the game for 30 minutes.
Encounter the researcher in the cave.
Out of the woods.
Strike 300 times.
Meet Suzu and become friends.
Defeat Rye in the woods.
Defeat Lev in the woods.
Defeat the bear in the meadow.
Activate the game for 15 minutes.
Clear the first area of the story.
Got your first shards of the star.
First time in fever state.