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