Colonists convert to your cult through three major factors.

1. Talking to a friend, who is a cultist. [Social Intaction named: Shared beliefs]
2. Researching at the forbidden knowledge center.
3. Good sermons.

Colonists lose cult-mindedness through:

1. Talking to someone who they don't like very much who is a cultist. Someone with less than +10 friendliness who is cult-minded will have a chance of offending their beliefs.
2. Bad sermons.

Why won't my colonists convert?!
The answer is simple. You should probably change your gameplay style a bit to completely convert a colony. Making cults has never been a simple task! Let's try some strategy to get them all converted.


This will always work and it is easy to do with colonists who can research.
Simply have them be the top priority researcher in the job menu, research some occult research, and have fun.


Keep your colonists who are cult-minded together on one side of the colony.
Keep your non-cultists on one side of the colony.
Make a cult training room.
In the conversion room, keep two colonists.
A non-cultist and a friendly cultist.
When the two interact, they should be sharing beliefs enough to cause conversion within a few days.
When a cultist is converted to the cult, they will not lose cult-mindedness through interactions anymore.

We're also planning on adding another deity that uses a brianwashing spell, but this should work in the meantime.