Altered Beast is a classic beat 'em up arcade game developed and manufactured by SEGA inThe game is set in Ancient Greece and follows a centurion who is resurrected by Zeus to save his daughter Athena, who has been kidnapped by the evil god Neff. In order to save his daughter, the centurion must fight through hordes of undead creatures and bosses, transforming into different beasts with the use of power-ups.

The game features five levels, each with its own unique boss fight and power-up that transforms the centurion into a different beast. The gameplay is simple yet challenging, with players having to dodge and attack enemies while managing their health and power-up meter. Altered Beast was a popular arcade game and was later ported to several home video game consoles and home computers, including the Mega Drive/Genesis, where it was a pack-in game.

Overall, Altered Beast is a classic beat 'em up game that is still fun to play today. Its simple gameplay mechanics and unique beast transformations make it a memorable experience that is worth revisiting.