You are a vampire who is looking for a way to become human again. You start in your castle and, like a vampire, you have the powers to transform yourself into a bat, rat, fog, hypnotize people and cause storms. To increase your energy you have to drink blood but you can stay outside your coffin only at night, otherwise you'll be destroyed.
Notes
Year of release is unknown, but apparently it is the first Italian game for the C64, written by Wyz (The Wizard), a mysterious author who doesn't seem to have released any other games.