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