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