Altered Beast is a fighting game for the Mega Drive, published by Sega in 1988.
Athena, the daughter of Zeus, has been kidnapped by the evil Neff and taken to the underworld. The almighty god cannot take part in the conflict, so he brings back to life a once glorious Roman centurion fallen in combat, to rescue her from her before she is sacrificed.
Although the daring warrior is seasoned in a thousand and one bloody battles, this time his human strength will not be enough to face the grotesque beings of hell. That is why Zeus provides him with the possibility of acquiring magical spheres, which contain within them the powers of supernatural mythological beasts.