Knights of the Round

"Knights of the Round (ナイツオブザラウンド) is an arcade game released by Capcom in 1991. 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 RPG-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." Source: Wikipedia, "Knights_of_the_Round_(video_game)," available under the CC-BY-SA License.