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