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.
Unlock 35 items from Lugh's information shop.
Knock down 3 GuBee's kings.
Visit 50 areas.
Knock down 20 boss-level monsters.
Unlock 21 items from Lugh's information shop.
Maximum damage exceeds 99999.
Increase the adventurer level to 300.
Release all outfits.
Release the ninja outfit.
Release the witch's outfit.
Increase the adventurer level to 200.
Maximum damage exceeds 9999.
Release the spearman outfit.
Release the cook's outfit.
Visit 25 areas.
Collect a cumulative total of 100000 shards of stars.
Collect a cumulative total of 10000 shards of stars.
Knock down 100 monsters.
Increase the adventurer level to 100.
Defeat the GuBee's King.
Unlock 7 items from Lugh's information shop.
Start endless mode
Collect 23 achievement stamps.
Collect 10 pieces of cheese.
Update your high score on the Road to Cheese.
Complete the story
Release the guardians of the Forgotten metropolis.
Informed Shiro what you want.
Activate the game for 60 minutes.
Discovering the Forgotten Forgotten capital.
Go into fever mode 10 times.
Defeat the cave boss.
Activate the game for 30 minutes.
Knock down 50 monsters.
Strike 300 times.
Out of the woods.
Encounter the researcher in the cave.
Meet Suzu and become friends.
Activate the game for 15 minutes.
Defeat Rye in the woods.
Defeat Lev in the woods.
Defeat the bear in the meadow.
Clear the first area of the story.
First time in fever state.
Got your first shards of the star.