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.
Activate the game for 60 minutes.
Collect 47 achievement stamps.
Collect 50 pieces of cheese.
Collect 30 pieces of cheese.
Defeat the GuBee's King.
Knock down 3 GuBee's kings.
Unlock 35 items from Lugh's information shop.
Visit 50 areas.
Maximum damage exceeds 99999.
Unlock 21 items from Lugh's information shop.
Activate the game for 30 minutes.
Release the witch's outfit.
Release the ninja outfit.
Release the spearman outfit.
Release all outfits.
Release the cook's outfit.
Increase the adventurer level to 300.
Knock down 20 boss-level monsters.
Increase the adventurer level to 200.
Go into fever mode 10 times.
Visit 25 areas.
Unlock 7 items from Lugh's information shop.
Maximum damage exceeds 9999.
Knock down 100 monsters.
Increase the adventurer level to 100.
Collect 23 achievement stamps.
Collect a cumulative total of 10000 shards of stars.
Collect a cumulative total of 100000 shards of stars.
Start endless mode
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.
Activate the game for 15 minutes.
Discovering the Forgotten Forgotten capital.
Defeat the cave boss.
Knock down 50 monsters.
Encounter the researcher in the cave.
Out of the woods.
Strike 300 times.
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.