Here is the full list of all 21 Ys II Chronicles+ achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Completely fill the character notebook.
Unlock all details for all non-boss bestiary entries.
Find and speak with Aldow.
Complete Ys II on any difficulty.
Slaughter ten generations of gatekeeper.
Ensure that Maria is not amused.
Raise Tarf to max level.
Oh God make them go away!
Burn 50 villagers.
Receive and eat four unique homemade food items.
Make all the animals in Ramia Village absolutely adore you.
Max out your money.
Eliminate all the monsters in Gila's basement.
Receive money from a duck.
Receive a free Short Sword.
Scatter apples violently across the floor, most likely bruising them horribly.
Complete Ys II on Nightmare difficulty.
Complete Ys II Time Attack.
"Measure" Tarf.
Sleep in three women's beds.
Master every achievement in Ys II.