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