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