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