In this side scrolling action game set in Washington City, which was initially released in 1991, the player takes the role of a super warrior who must battle against ghosts from the past bent on taking over the present. The main feature of this title is the ability to change characters in mid-play. If you release an incarcerated character while fighting against the enemy, that character becomes available for you to use. The key to a successful strategy is adeptly switching among the ninja dog, samurai or ninja according to the situation. You can also pick up items like weapons and orbs that give you magical attacks. Not only is there adventure to be had in the regular world, but also in a parallel universe, where stages change at a hectic pace, with never a dull moment.