Altered Beast is one of the first and few games to deal with humans transforming into beasts. It is also one of the darker titles to grace arcades and consoles during the SEGA Master System days. You plow your way through throngs of demon and the undead to save Athena from the Demon God Neff in the Underworld. Zeus resurrects you–a dead-and-gone centurion for this task. He also grants you the ability to absorb souls in order to transform yourself into beast/man hybrids in order to fight Neff and his minions. Some of the hybrids involve the bear, werewolf, dragon, and rhino–all with different attributes and abilities to help you trample your enemies.