Conquering of the Royal Keep is a decision driven, visual novel game in which the player takes on the persona of a squire of the Royal Guard, entering their final stage of training to become a full knight. However, there is more to the Royal Keep that meets the eye. As the squire makes their way through the trials and tribulations set forth by their last task, it is soon noticed that something about this keep is wrong, and the squire must face their death time and time again until they can finally conquer the mysteries of the Royal Keep.