Arthur's goal is to rescue his princess from the Demon King Astaroth and his forces. He faces many undead creatures, including ghosts, zombies, bats, ogres, and goblins. Other obstacles include moving platforms, ladders, and water/fire hazards.
The gameplay involves walking left and right, jumping, and using a lance as a weapon. Getting hit by enemies causes Arthur to lose his armor and run around in his underpants. Losing another life will cause the player to start over from the last checkpoint. Power-ups like daggers and bombs can be picked up during the game to increase firepower.