by Tatakais
CLEANED UP VERSION (SIMPLIFIED) :Setup
Pick Two Families Each. These are your families for the entire campaign - the Fifth Family is not used.
Select one to be your Primary Branch and the other to be your Secondary Branch. This can not be changed later.
Playing
During Non-Haunt play. You control your families alternating turns between you and the other player.
During Haunt play. Haunt/Traitor hands over their Secondary Branch Family to the other player and for the purposes of the Haunt, the Primary Branch becomes the Haunt/Traitor, switching spaces if need be.
During Haunt play. Haunt/HIDDEN Traitor is chosen by the player to be either on their Primary Branch or Secondary Branch. They will only win if they fulfill the Traitor objective. They will need to make use of the other family to mask their actions to hide which Family has the Traitor role.
For the other player it will be down to them to discern which family is the traitor to go after.
A successful Traitor may lead the other player astray by inflicting damage on their own Family branch to send mixed signals.
Family items are NOT shared between Family Branches and at no point are items exchanged or swapped around unless prior to a haunt reveal in which case the positions of the family branch are switched as if it was the Primary Branch member who found the Haunt triggering item.
All in all this will give a feel of a 4 player game, you will have a sense of ownership over your Primary Family Branch as that Family never changes hands and the Secondary Family serves the purpose of being handed over in the event of a Traitor Haunt and is used to divert attention or draw attention as the player sees fit for the Hidden Traitor scenarios.