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