King Arthur II is a real-time tactics turn-based strategy role-playing game. Gameplay in King Arthur II is a mix of real-time strategy, role-playing, and grand strategy elements. The grand strategy portion of the game is played on a large campaign map of Britannia. As in the previous game, other heroes join the army of William and eventually, a second army led by Morgan Le Fay becomes available as William allows her to search for her mentor Merlin in the name of King Arthur. Over the course of the game, Septimus Sulla attacks from the North.