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