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