The Sega Master System port of Altered Beast. It has heavily modified visuals due to technology capabilities. Unlike those versions the SMS port only includes single player mode and had only four levels.

You were once a Roman Centurion. You died bravely in a battle. Now, a hundred years later, you have been called back from the grave by Zeus, God of Thunder. Even as he grants you new life he gives you a mission. You must rescue his daughter Athena from the evil clutches of Neff; Lord of the Underworld. From the surface to the very heart of the Underworld you must journey, fighting Neff's undead army every step of the way! Zombies, demons, gargoyles, three-headed Wolves. But in this life you have been given an edge... the power to transform into magical beasts of awesome power! From a man to a superman...to a werewolf, were-dragon, were-tiger and the ultimate...a Golden Wolf! Each form has supernatural abilities. You'll need them all...for Neff is a fearsome enemy. Fail, and Athena's fate will be unspeakable. Win...and you may take a place in the Pantheon of Immortality! Remember...Never say die!