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