CS Mafia Rules
Version 0.6 – Updated 2026.11.09
This is a variant of the game Mafia.
What Is This Game All About?
The Mafia kill players during the night, while the Civilians try to identify and stop them before it is too late.
Players are divided into two main teams:
- Mafia Team
- Civilian Team
There are also a few smaller faction teams, but the main conflict is between the Mafia and the Civilians.
The objective of the game is simple: eliminate the opposing team and fulfill your team’s victory condition.
Each player receives a secret role at the start of the game. Roles are hidden from the other players and usually come with unique special abilities.
The Mayor
The Mayor is the game moderator. They narrate the game, coordinate the rounds, and ensure that all rules are followed correctly.
The Mayor keeps their eyes open throughout the game but may not influence players’ decisions or reveal information. They may encourage participation and make sure everyone has a chance to speak during the Day phase.
Round Structure
The game alternates between two phases:
- Day
- Night
Day Phase
During the Day, all players keep their eyes open and are free to discuss, argue, accuse, and defend themselves.
At the end of the Day, the group may choose one player to be imprisoned and executed. This decision is made through a vote.
Because roles are secret, players are encouraged to deceive, bluff, and persuade others. Mafia members will usually pretend to be on the Civilian Team in order to avoid suspicion and execution.
Night Phase
During the Night, players close their eyes and most communication stops.
The Main Mafia Members secretly choose one player to kill.
In addition, most special roles may use their abilities during this phase.
Special Rounds
First Night
The game always begins with a Night phase.
This allows various roles to activate or receive information before the first Day begins.
During the First Night, the Main Mafia Members do not perform a kill.
All other roles act normally unless stated otherwise by their role description.
From the Fourth Night Onward
Starting on the Fourth Night, the Main Mafia Members kill two players each Night instead of one.
As a result, beginning with the following Day, the group may imprison and execute two players each Day instead of one.
This rule remains in effect for the rest of the game.
Winning the Game
=Mafia Team Wins=
Main Mafia Members >= Civilian Members
The Mafia-Team wins the game if at the start of a Day there are as many or more main Mafia members as Civilian Members.
Sidekicks do not count when counting the winning condition.
=Civilian Team Wins=
Main Mafia Members are eliminated
The Civilian-Team wins the game when the main Mafia members are removed from the game.
Sidekicks do not count when counting the winning condition.
Forming the Teams
In order to find out which roles it’s an art form by itself and it also depends on the type of people you may have.
As as starting point you should use this ratio to calculate the roles:
Main Mafia type = Players × 0.2
Mafia Sidekick type = Players × 0.15
Civilian type = Players × 0.55
Neutral type = Players × 0.1
A typical example is for a group of 10 players:
(Main Mafia type / Red) x 2 players
(Mafia Sidekick / Pink) x 1 player
(Civilian type / Blue) x 7 players
ROLE DESCRIPTIONS
Amnesiac
An Amnesiac initially does not belong to any team. During the first night the Amnesiac will choose one other person to be their Relative. Everyone is informed who is the Relative of the Amnesiac the next day.
The Amnesiac adopts the same team as their chosen Relative that can be either Civilian-Team or Mafia-Team as a Sidekick. The catch is that the Amnesiac is never informed which.
Anti-Doctor
The Anti-Doctor belongs to the Mafia-Team as a Sidekick.
Once per night the Anti-Doctor may try to cancel the heal effect of the Doctor or the protection from a Bodyguard. They are informed instantly if they have chosen the correct person to Unheal.
The Anti-Doctor cannot Unheal themself.
If the Anti-Doctor chooses the Doctor, then we say that they found the Doctor. In this case the Doctor is being blocked permanently and cannot protect anymore. This is announced during the next day.
Bodyguard
The Bodyguard is part of the Civilian-Team.
Once per night they may protect one person.
If that person is the targeted victim of the main-mafia members then the murder is canceled. Instead the bodyguard gets injured and kills one of the main-mafia members. The Mayor decides randomly who. Once the bodyguard gets injured the second time of a succesful protection then they die but doesn’t get to attack back.
During the next day the person who was protected last night is known to the rest of the players by saying “We found protection cigarettes next to this person”.
The Bodyguard cannot protect someone from poisoning and they cannot attack back.They also cannot protect themselves.
Civilian
A Civilian is part of the Civilian-Team. They have not special ability.
Civilian-Tina
Civilian-Tina is part of the Civilian-Team. During the first night Civilian-Tina and Civilian-Tony see each other and become partners.
They have not other ability.
Civilian-Tony
Civilian-Tony is part of the Civilian-Team. During the first night Civilian-Tina and Civilian-Tony see each other and become partners.
They have no other ability.
Cat
The Cat is initially part of the Civilian-Team. The Cat can only say the word “Meow” and not talk. The Cat every night chooses to “sleep” with one person. If that person is part of the Mafia-Team they know their role. Then they become instantly part of the Mafia-Team as a Sidekick till the end of the game.
Cop
A Cop is part of the Civilian-Team. Once every night, even the first one, they may choose to investigate one person. The following day the result of the investigation is announced to the all the players. If that person belonged to the Mafia-Team the result is possitive, otherwise it is negative.
Keep note that some other roles have the ability to give false results. For example the Suspect always appears to be part of the Mafia-Team but in reality are not.
The result of the investigation is announced the next day even if the cop dies during the night.
Coroner
A Coroner is part of the Civilian-Team. If there are eliminated players at the start of a night then the Coroner can choose to investigate one of them. They instantly learn their role. The mayors shows them a note with the role written on it.
Detective
A Detective is part of the Civilian-Team. Once every night, even the first one, they may choose to investigate one person. They may choose even themselves. They instantly learn their role.
The investigated person is revealed the next day publickly.
Devoted Lover
The Devoted Lover intially belongs to the Civilian-Team. On the second night the Devoted Lovers has to choose their love partner.
The Devoted Lover shares the same team as their partner. It can be either Civilian-Team or Mafia-Team as a Sidekick. You are notified which team you get on that night.
If the the love partner is eliminated from the game the Devoted is eliminated too.
Disease Spreader
A Disease Spreader is part of the Civilian-Team. Once per night picks one person to give them the Flu Disease. The player who has the Flu Disease has to start coughing during the day. The only person who cannot have have Flu Disease is the Disease Spreader themself. The Doctor can cure a victim of a Flu Disease.
Doctor
A Doctor is part of the Civilian-Team. Once per night they may choose one person to protect and heal from being murdered from the main Mafia Team.
During the next day the person who was protected last night is known to the rest of the players by saying “We found medicine next to this person”.
A Doctor cannot heal themeselves. If the doctor heals someone who is being poisoned then the poison is removed and the person is saved.
Dog
The Dog belongs to the Civilian-Team. The Dog cannot speak any real words. They can only bark with the sound “Woof”.
The Dog sniffs one person during the night trying to find the Cop. When they find them they can talk normally and in addition will have their eyes open when the Cop chooses a target to investigate. If the Cop is eliminated the Dog cannot speak normally only bark. The Dog cannot Sniff eliminated people.
Double-Skined Civilian
The Double-Skinned Civilian belongs to the Civilian-Team.
If the Double-Skinned Civilian becomes the target of a murder by the Main Mafia-Team members instead of dying they become injured. If the Double-Skinned Civilian is already injured then they die.
During the next day everyone knows that someone was injured during the night but don’t know who.
If the Double-Skinned Civilian goes to jail voted by the other civilians the double hit ability doesn’t work. They go to jail as a normal civilian.
Godfather
The Godfather is a main member of the Mafia-team. Together with the other main mafia members each secondary night they decide who they want to murder.
The goal of the Civilian-Team is to eliminate all main mafia members. That includes Mafia, Mafia-Picolo or the Godfather. Not all such roles may exist in the game. Once all the main Mafia-Team members are eliminated the game ends.
The main mafia members will open their eyes during the night once the mayor tells them. Then they will agree silently and they will point at one person as their designated murder target. The eliminated main mafia members as well as the mafia sidekicks do not get to decide about the murder target.
The main mafia members are free to choose and kill one of their team too. They may even skip killing.
The special ability of the Godfather is that if he is being investigated by the Cop andthe Detective they will always appears as part of the Civilian-Team.
Hooker
The Hooker belongs to the Mafia-Team as a Sidekick. Once per night the Hooker may “Kiss” one person and block their special ability. They will block both Civilian type and Mafia type roles. This includes the roles of the Cop, Detective, Doctor, Bodyguard, Coroner, Dog, Cat, Hunter, Suicide Hero, Disease Spreader, Santa Claus, as well as Mafia, Mafia-Picolo, Godfather, Mole, Snitch, Poisoner and Anti-Doctor.
If they Kiss a main Mafia member but there is another main Mafia member still in the game the killing is happening during the night. If not the killing is blocked.
The Hooker also learns the identity of the person kissed.
If there was a persson kissed during the night everyone knows who publicly the next day.
The Hooker cannot kiss themselves. The hooker may choose not to kiss for the night.
Hunter
A Hunter is part of the Civilian-Team. If the Hunter is killed by the main Mafia Members during the night then the Hunter takes revenge the following day. The Hunter has to choose any other person to kill and eliminate from the game. Then the Hunter dies too.
Lazarus
A Lazarus is part of the Civilian-Team. Starting from the second Night Lazarus may fake dying only once. On the next day you skip participating in voting since everyone thinks you might be killed by the Mafia-Team. You cannot talk. After the voting is finished you must reveal yourself and become a normal civilian.
You may fake die only once per game.
If you are being murdered or voted to go to prison while you are fake dying then you are dead for real.
Mafia
A Mafia is a main member of the Mafia-team. Together with the other main mafia members each secondary night they decide who they want to murder.
The goal of the Civilian-Team is to eliminate all main mafia members. That includes Mafia, Mafia-Picolo or the Godfather. Not all such roles may exist in the game. Once all the main Mafia-Team members are eliminated the game ends.
The main mafia members will open their eyes during the night once the mayor tells them. Then they will agree silently and they will point at one person as their designated murder target. The eliminated main mafia members as well as the mafia sidekicks do not get to decide about the murder target.
The main mafia members are free to choose and kill one of their team too. They may even skip killing.
Mafia-Picolo
A Mafia-Picolo is a main member of the Mafia-team. Together with the other main mafia members each secondary night they decide who they want to murder.
The goal of the Civilian-Team is to eliminate all main mafia members. That includes Mafia, Mafia-Picolo or the Godfather. Not all such roles may exist in the game. Once all the main Mafia-Team members are eliminated the game ends.
The main mafia members will open their eyes during the night once the mayor tells them. Then they will agree silently and they will point at one person as their designated murder target. The eliminated main mafia members as well as the mafia sidekicks do not get to decide about the murder target.
The main mafia members are free to choose and kill one of their team too. They may even skip killing.
The difference between a Mafia-Picolo and a Mafia role is that the Mafia-Picolo is the one that the role Witness gets to know.
Mole
The Mole is part of the Mafia-Team as a Sidekick. Once per night the Mole may know who the Cop,the Detective, the Dog and the Coroner investigated for the night.
Nana
The Nana is part of the Mafia-Team but just a Sidekick. At the first night Nana knows who belongs in the Mafia-Team but doesn’t know who is who.
Necromancer
Initially the Necromancer is part of the Civilian-Team. Once per game the Necromancer can take the role of an eliminated person. They learn the role when they activate this ability. They can activate their ability during any Night. Then Night that they take the new role they cannot use the role.
Poisoner
The Poisoner is part of the Mafia-Team but just a sidekick. The Poisoner has an ability that get be used only once in the whole game. After the first night, and any night the Poisoner can poison one player. That person dies the next night. When poison is planted everyone is notified about it.
Only the Doctor and the Bodyguard can potential cure and remove the poison.
Santa Claus
Santa Claus is part of the Civilian-Team. Every night they choose one person that receives a gift. The gift is revealed to them and everyone else during the next day. The gift can be just a card with the name gift on it.
A person who at the start of a Night has a gift has the option of using the card. They may chose to check on another players and see in which team they belong to in the same way the Cop does. That includes with the false alarm of the Suspect. In addition a Hooker can also cancel this ability. If the gift is used the card is removed from the game.
A person can only get one gift during a game. A Santa Claus cannot gift themselves.
Snitch
The Snitch is part of the Mafia-Team as a Sidekick. A Snitch once per night event the first one may choose one person to check. They are informed by the Mayor of their actual role. This can be done with a written note shown during that night.
Suicide Hero
The Suicide Hero is part of the Civilians-Team. The Suicide Hero has the ability to choose to commit suicide themselves during the day and at the same time killing one other person. This ability cannot be inititated when the voting has started.
If the Suicide Hero activates their ability, then there is no voting for jail during that Day.
Suspect
The Suspect is part of the Civilian-Team. If they are investigated by the Cop or the Detective they appear to be part of the Mafia-Team even though they are not.
Witness
The Witness is part of the Civilian-Team. At the first night the witness is informed of who the Mafia-Picolo is.
Witness Drunk
The Witness Drunk is part of the Civilian-Team. The Witness-Drunk knows 2 Suspicious people in the game. One of them is the Mafia-Picolo while the other is a random Civilian-Team member (decided by the Mayor at game start). They do not know which is which though.
Witness Very Drunk
The Witness Very Drunk is part of the Civilian-Team. The Witness Very Drunk knows 3 Suspicious people in the game. One of them is the Mafia-Picolo while the others are a random Civilian-Team member (decided by the Mayor at game start). On the first Night 2 of the Suspicious people are revelead randomly. The 3rd one is revealed on the second night to them. They do not know which is which though.
Witness Beaten
The Witness Beaten is part of the Civilian-Team. The Witness Beaten on the first night knows 4 Suspicious people in the game. One of them is the Mafia-Picolo while the others are a random Civilian-Team member (decided by the Mayor at game start). On each subsequent night the Witness Beaten list of Supicious people is reduced by one until the fourth night that they get to know the Mafia-Picolo. The list remains unaltered even if people in that list are eliminated from the game.