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