So, you start on the Knight Route, and stay on that if you succeed in missions. If you fail enough missions (3 IIRC) you get kicked out of the knights and get on the wanderer route. If you murder enough people, an option after fighting certain enemies and talking to some people in town, you get the resistance route. Note that there's an option in the settings to murder by default or something like that (don't remember the specifics of the setting) that you should check, since it may prevent the chide to murder from appearing at all.