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