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