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