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.
Knock down 3 GuBee's kings.
Visit 50 areas.
Collect 47 achievement stamps.
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.
Collect 50 pieces of cheese.
Activate the game for 60 minutes.
Increase the adventurer level to 300.
Release all outfits.
Release the witch's outfit.
Release the ninja outfit.
Increase the adventurer level to 200.
Visit 25 areas.
Release the spearman outfit.
Maximum damage exceeds 9999.
Release the cook's outfit.
Knock down 100 monsters.
Collect a cumulative total of 100000 shards of stars.
Increase the adventurer level to 100.
Collect a cumulative total of 10000 shards of stars.
Start endless mode
Collect 30 pieces of cheese.
Collect 10 pieces of cheese.
Collect 23 achievement stamps.
Update your high score on the Road to Cheese.
Complete the story
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Unlock 7 items from Lugh's information shop.
Activate the game for 30 minutes.
Go into fever mode 10 times.
Defeat the cave boss.
Discovering the Forgotten Forgotten capital.
Encounter the researcher in the cave.
Knock down 50 monsters.
Out of the woods.
Activate the game for 15 minutes.
Strike 300 times.
Meet Suzu and become friends.
Defeat Rye in the woods.
Defeat the bear in the meadow.
Defeat Lev in the woods.
Clear the first area of the story.
Got your first shards of the star.
First time in fever state.