[BigBroFanHere]

Possibly Heaven and Hell again, or make half the house slaves, actually make it like hell. If they fail a task then give them no hot water. Some sort of really hard task, put each housemate in a room with their greatest fear for 5 mins, and say like 7 out of 12 need to complete their 5 mins. Take away a few beds, make them have to earn electricity or something like that. Maybe something like where someone has to steal all the food, like make them take it all to the diary room without being caught, and then that housemate will get meals in the diary room and some luxuries while the others get limited food.