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