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