A rule that is widely used in China

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Dear ______,
You are a mafia. Your partner(s) is(are)______. Every night, you have a meeting (until there is only one mafia) and kill a person. He will die unless the doctor protected he the same night. However, he could leave his last words first. You can choose to kill your members or kill nobody at all. Nobody else is sided with you. Your objective is to have all the cop(s) or all the non-cop "town" roles die.

Dear ______,
You are a(the) cop. (Your partner(s) is(are)______.)(cops are always fewer than mafias by 1 person) Every night, you have a meeting (until there is only one cop) and investigate a person. You will know his role-exact role. You are sided with the townies.

Dear ______,
You are the vigil. You can kill one person at night during the game. He will die unless the doctor protected he the same night. However, he could leave his last words first. You can choose to kill yourself. You are sided with the townies.

Dear ______,
You are the doctor. Every night, you protect a person. He will be kept from being killed by the mafia or/and the vigil. However, if he is not killed by anyone, he is wrongly protected. And if you wrongly protected the same person again, he is overprotected and died. He could leave his last words first. You can choose to protect yourself. You are sided with the townies.

Dear ______,
You are a townie. You don't have special power. What you have is ___ power roles and ___ other townies sided with you. Your objective is to have all the mafias die before they win. (So when both objective is fulfilled, you lose)