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.
Knock down 3 GuBee's kings.
Unlock 21 items from Lugh's information shop.
Knock down 20 boss-level monsters.
Visit 50 areas.
Maximum damage exceeds 99999.
Defeat the GuBee's King.
Activate the game for 30 minutes.
Increase the adventurer level to 300.
Maximum damage exceeds 9999.
Unlock 7 items from Lugh's information shop.
Release the witch's outfit.
Release the ninja outfit.
Release the spearman outfit.
Release all outfits.
Increase the adventurer level to 200.
Visit 25 areas.
Collect a cumulative total of 100000 shards of stars.
Collect a cumulative total of 10000 shards of stars.
Release the cook's outfit.
Knock down 100 monsters.
Increase the adventurer level to 100.
Start endless mode
Collect 50 pieces of cheese.
Collect 23 achievement stamps.
Activate the game for 15 minutes.
Collect 10 pieces of cheese.
Collect 30 pieces of cheese.
Complete the story
Update your high score on the Road to Cheese.
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.
Go into fever mode 10 times.
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.