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.
Visit 50 areas.
Collect 47 achievement stamps.
Unlock 35 items from Lugh's information shop.
Release the witch's outfit.
Knock down 3 GuBee's kings.
Release the ninja outfit.
Release the spearman outfit.
Release all outfits.
Defeat the GuBee's King.
Release the cook's outfit.
Unlock 21 items from Lugh's information shop.
Maximum damage exceeds 99999.
Increase the adventurer level to 300.
Knock down 20 boss-level monsters.
Increase the adventurer level to 200.
Visit 25 areas.
Activate the game for 60 minutes.
Maximum damage exceeds 9999.
Knock down 100 monsters.
Increase the adventurer level to 100.
Collect a cumulative total of 100000 shards of stars.
Collect a cumulative total of 10000 shards of stars.
Start endless mode
Collect 30 pieces of cheese.
Collect 50 pieces of cheese.
Collect 23 achievement stamps.
Complete the story
Update your high score on the Road to Cheese.
Collect 10 pieces of cheese.
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Activate the game for 30 minutes.
Unlock 7 items from Lugh's information shop.
Discovering the Forgotten Forgotten capital.
Go into fever mode 10 times.
Strike 300 times.
Defeat the cave boss.
Encounter the researcher in the cave.
Knock down 50 monsters.
Out of the woods.
Activate the game for 15 minutes.
Meet Suzu and become friends.
Defeat Rye in the woods.
Defeat Lev in the woods.
Defeat the bear in the meadow.
Clear the first area of the story.
First time in fever state.
Got your first shards of the star.