This is the campaing of Sir Roderic. You will find 9 maps in this folder: Sir Roderic Island Part1. These maps tells the History of a king Conquering his realm.
Moreover the story (txt)and a picture of the all world (island).
If you want to play the extra maps including the multiplayer maps you must download Sir Roderic Island part2 With 5 more maps (these maps do not continue the campaing but are relationed to the Island as well)