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