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