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 50 pieces of cheese.
Collect 47 achievement stamps.
Unlock 35 items from Lugh's information shop.
Activate the game for 30 minutes.
Visit 50 areas.
Knock down 20 boss-level monsters.
Knock down 3 GuBee's kings.
Unlock 21 items from Lugh's information shop.
Release the witch's outfit.
Release all outfits.
Release the ninja outfit.
Release the spearman outfit.
Release the cook's outfit.
Maximum damage exceeds 99999.
Maximum damage exceeds 9999.
Unlock 7 items from Lugh's information shop.
Increase the adventurer level to 300.
Increase the adventurer level to 200.
Collect a cumulative total of 100000 shards of stars.
Visit 25 areas.
Activate the game for 15 minutes.
Defeat the GuBee's King.
Knock down 100 monsters.
Increase the adventurer level to 100.
Collect 23 achievement stamps.
Start endless mode
Update your high score on the Road to Cheese.
Collect 10 pieces of cheese.
Collect 30 pieces of cheese.
Complete the story
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Collect a cumulative total of 10000 shards of stars.
Discovering the Forgotten Forgotten capital.
Defeat the cave boss.
Knock down 50 monsters.
Go into fever mode 10 times.
Strike 300 times.
Encounter the researcher in the cave.
Out of the woods.
Meet Suzu and become friends.
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.