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