One person is chosen to be the 'psychiatrist' and temporarily leaves the room.
The remaining participants decide on a 'disease' or condition, for example, 'everyone is a superhero', 'you must always look at a part of the psychiatrist', or 'always start an answer with the word "ummm".'
The psychiatrist re-enters the room and starts asking questions to the participants.
The participants answer truthfully following the identity or condition they decided on. For instance, if the 'disease' is 'everyone is a superhero', they must respond as if they are the superhero.
The goal of the psychiatrist is to deduce the original 'disease' from the participants' responses.
Enjoy playing!