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