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