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.
Collect 30 pieces of cheese.
Release the cook's outfit.
Release the spearman outfit.
Release all outfits.
Release the ninja outfit.
Release the witch's outfit.
Unlock 21 items from Lugh's information shop.
Unlock 35 items from Lugh's information shop.
Go into fever mode 10 times.
Maximum damage exceeds 99999.
Knock down 3 GuBee's kings.
Knock down 20 boss-level monsters.
Maximum damage exceeds 9999.
Visit 50 areas.
Defeat the GuBee's King.
Increase the adventurer level to 300.
Increase the adventurer level to 200.
Visit 25 areas.
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.
Start endless mode
Collect 10 pieces of cheese.
Update your high score on the Road to Cheese.
Complete the story
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Activate the game for 60 minutes.
Discovering the Forgotten Forgotten capital.
Defeat the cave boss.
Activate the game for 30 minutes.
Knock down 50 monsters.
Out of the woods.
Encounter the researcher in the cave.
Strike 300 times.
Meet Suzu and become friends.
Defeat Rye in the woods.
Defeat Lev in the woods.
Activate the game for 15 minutes.
Clear the first area of the story.
Defeat the bear in the meadow.
Got your first shards of the star.
First time in fever state.