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.
Unlock 35 items from Lugh's information shop.
Defeat the GuBee's King.
Knock down 20 boss-level monsters.
Maximum damage exceeds 99999.
Unlock 21 items from Lugh's information shop.
Release all outfits.
Release the ninja outfit.
Release the witch's outfit.
Release the spearman outfit.
Release the cook's outfit.
Increase the adventurer level to 300.
Maximum damage exceeds 9999.
Unlock 7 items from Lugh's information shop.
Collect 10 pieces of cheese.
Collect 30 pieces of cheese.
Visit 25 areas.
Update your high score on the Road to Cheese.
Increase the adventurer level to 200.
Collect a cumulative total of 100000 shards of stars.
Collect a cumulative total of 10000 shards of stars.
Knock down 100 monsters.
Collect 23 achievement stamps.
Increase the adventurer level to 100.
Start endless mode
Complete the story
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Go into fever mode 10 times.
Discovering the Forgotten Forgotten capital.
Activate the game for 60 minutes.
Defeat the cave boss.
Knock down 50 monsters.
Encounter the researcher in the cave.
Strike 300 times.
Out of the woods.
Activate the game for 30 minutes.
Meet Suzu and become friends.
Activate the game for 15 minutes.
Defeat Rye in the woods.
Defeat Lev in the woods.
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.