Dragon Warrior II © 1990 Enix of America.
North Aerica release. Game developed in Japan. See the original Japanese entry release for more information; "Dragon Quest II - Akuryou no Kamigami [Model EFC-D2]
Description from the back cover:
Long ago, a descendant of Erdrick the Great defeated the Dragonlord and recovered the mystical ball of light in Alefgard. Under the rule of his children and their descendants there was prosperity throughout the land for generations. One day, however, this peace was shattered by the wicked Sorcerer Hargon. Now it is time for you to claim your birthright as the Prince of Midenhall, for Erdrick's blood also flows through your veins. With the Prince of Cannock and the Princess of Moonbrooke by your side, you are about to embark on a most adventurous journey. Use your strength and cunning for you are about to enter the world of Dragon Warrior II.