Knights of the Round is a side-scrolling beat em up based loosely on the legend of King Arthur and the Knights of the Round Table, the game features an role-playing video game-like level advancement system, with fighters getting new weapons and armour as they advance through the game, however the player can not choose how to upgrade his/her character - the level up system is static.

Arthur, who had been training himself to be a great knight, pulled out the sacred sword Excalibur from the rock. After pulling it out, Arthur realized his destiny was to become the first King of the Britons. Merlin then sends Arthur and his two closest companions, Lancelot and Perceval, to overthrow the evil king Garibaldi and to unite England.