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.
Visit 50 areas.
Knock down 3 GuBee's kings.
Release the witch's outfit.
Release all outfits.
Release the ninja outfit.
Release the spearman outfit.
Release the cook's outfit.
Unlock 35 items from Lugh's information shop.
Activate the game for 60 minutes.
Unlock 21 items from Lugh's information shop.
Defeat the GuBee's King.
Knock down 20 boss-level monsters.
Increase the adventurer level to 300.
Maximum damage exceeds 99999.
Visit 25 areas.
Increase the adventurer level to 200.
Maximum damage exceeds 9999.
Collect a cumulative total of 100000 shards of stars.
Knock down 100 monsters.
Increase the adventurer level to 100.
Go into fever mode 10 times.
Collect a cumulative total of 10000 shards of stars.
Unlock 7 items from Lugh's information shop.
Collect 23 achievement stamps.
Start endless mode
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 30 minutes.
Defeat the cave boss.
Discovering the Forgotten Forgotten capital.
Knock down 50 monsters.
Out of the woods.
Encounter the researcher in the cave.
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.