There are several single player modes - tutorial, duel and campaign. The campaign is a series of missions which build on the premise of an invading army that must be repelled. While you are scurrying about, on your various tasks, you will find your way blocked by creatures that you must defeat in order to get past. In this regard, the game is somewhat linear. If you try to go any direction other than the one you are supposed to go in, your character will mention honor and duty (not directly, mind you, but in general) and you will be turned back. The path to your destination does not allow you to wander through the surrounding terrain.