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