In ages past, a corrupt mage named Garm used a set of Runestones to summon a demon named Skorne. However, Skorne crushed Garm and imprisoned his soul in the Underworld. Skorne, fearing the power of the Runestones, scattered them throughout the four realms, so that they could never be used against him. The player(s) must defeat the end bosses of each of the four kingdoms to obtain the four glass shards which allow access to the desecrated temple via a window in the starting tower and be able to banish Skorne to the Underworld. Its unusual features for an arcade game included passwords and characters that could be saved, enabling players to play over the course of a long period.