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.
Collect 50 pieces of cheese.
Collect 47 achievement stamps.
Collect 30 pieces of cheese.
Collect 10 pieces of cheese.
Unlock 35 items from Lugh's information shop.
Release the witch's outfit.
Release all outfits.
Visit 50 areas.
Knock down 3 GuBee's kings.
Knock down 20 boss-level monsters.
Maximum damage exceeds 99999.
Unlock 21 items from Lugh's information shop.
Release the ninja outfit.
Defeat the GuBee's King.
Release the spearman outfit.
Increase the adventurer level to 300.
Release the cook's outfit.
Maximum damage exceeds 9999.
Unlock 7 items from Lugh's information shop.
Increase the adventurer level to 200.
Visit 25 areas.
Knock down 100 monsters.
Collect a cumulative total of 100000 shards of stars.
Increase the adventurer level to 100.
Start endless mode
Collect 23 achievement stamps.
Update your high score on the Road to 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.
Go into fever mode 10 times.
Defeat the cave boss.
Knock down 50 monsters.
Encounter the researcher in the cave.
Strike 300 times.
Meet Suzu and become friends.
Out of the woods.
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.
Activate the game for 60 minutes.
Activate the game for 30 minutes.
Activate the game for 15 minutes.