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