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