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.
Unlock 35 items from Lugh's information shop.
Collect 47 achievement stamps.
Knock down 3 GuBee's kings.
Defeat the GuBee's King.
Knock down 20 boss-level monsters.
Maximum damage exceeds 99999.
Unlock 21 items from Lugh's information shop.
Increase the adventurer level to 300.
Maximum damage exceeds 9999.
Unlock 7 items from Lugh's information shop.
Collect 30 pieces of cheese.
Collect 50 pieces of cheese.
Increase the adventurer level to 200.
Visit 25 areas.
Release the witch's outfit.
Go into fever mode 10 times.
Release the spearman outfit.
Release all outfits.
Release the cook's outfit.
Release the ninja outfit.
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.
Activate the game for 60 minutes.
Collect 23 achievement stamps.
Start endless mode
Collect 10 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.
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.