Some games have secrets. 
Some games have secrets.
Some players may bluff. This means they tell lies to hide. You can play with cards or boards. You can also play on a computer.
In the game Mafia, teams work together. One team knows who they are. The other team tries to find them. It is a fun challenge.
Video games like Among Us are popular too. 
Have you ever played a game with secrets?
These games started as simple party games. One old game is called wink murder. In that game, a player kills others by winking at them. Later, card games like Mafia became very popular. In Mafia, the bad team knows each other. The good team must work to find them. 
Today, many people play these games on computers. Among Us is a very famous video game. It became popular in 2020. It helped people stay social during the pandemic. In Among Us, players must finish tasks while they look for impostors. 
Have you ever played a game where secrets are the most important part?
These games often use a special way of talking. There is usually a time for private secrets and a time for public talk. In the public phase, players can make accusations in a "public square." You might have to decide how long to stick to your story. This is a big part of the strategy. If you get new information, you must decide if your old story still works. Some people even use math to help make decisions in these games. If you play many rounds, you might start to learn how your friends act. This is called meta-gaming, where you think about past rounds to win the next one.
Social deduction games grew out of old party games. One very old game is called wink murder. In that game, a secret player "kills" others by winking at them. Later, card games like Hoax arrived in 1981. In Hoax, players could lie about which of seven characters they were playing. Another famous game is Mafia, which started in 1986. It actually began as a psychological experiment in Russia. It became a very popular card game about good and bad teams. Many people say that almost every game since then was inspired by Mafia. 
There are many different types of these games to explore. In the game Bang!, only the sheriff's role is known to everyone. In Secret Hitler, the fascists know each other, but they do not know who Hitler is. There are many board games like The Resistance or Avalon. You can also find video games like Town of Salem or Space Station 13. Some games were even made as custom maps for StarCraft. These maps helped inspire many other games on different computers. Even television shows like The Mole use these same ideas to create excitement.
Video games changed how we play these social games. A game called Among Us was released in 2018. It became huge in 2020 during the COVID-19 pandemic. This was because it helped people stay social while they stayed apart. One big improvement in Among Us was adding active tasks. Players must complete tasks while they look for the impostors. This makes the game feel very different from a simple card game. Whether you use cards or a computer, the goal is the same. You must use your mind to find the truth hidden in plain sight.
A social deduction game is a specific genre of play. In these games, players attempt to uncover hidden roles or team allegiances. Most games divide players into teams. One team is often labeled as "good" and the other as "bad." However, some games feature multiple teams or unique roles for every individual. Players must use logic and deductive reasoning to find the truth. Meanwhile, other players use bluffing to avoid suspicion. This creates a tension between secret knowledge and public discussion.
The mechanics of these games often rely on a split in communication. Gameplay is frequently divided into private and public phases. In the private phase, players may share information or act secretly. This is followed by a "public square" phase. During this time, players make accusations or share known facts. Strategy involves deciding how long to stick to a specific story. If new information arrives, players must decide if their previous claims still hold up. Some researchers even suggest using a Monte Carlo tree search to assist with decision-making.
Different games use different rules for what players can know. In the game Bang!, only the sheriff's role is known to everyone. In Secret Hitler, the fascists know each other's identities. However, they do not know which player is Hitler. In Mafia, only the mafia members know who is on their team and what their specific roles are. These variations change how players interact and how they must hide their identities. Each game requires a different approach to managing information and deception.
Social deduction has deep roots in older traditions. These games grew out of party games like wink murder. In that game, a secret player "kills" others by winking at them. One of the earliest formal card games was Hoax, released in 1981. In Hoax, players could lie about one of seven possible characters. A more influential game was Mafia, which began in 1986. Mafia actually started as an academic psychological experiment in Russia. It later became a popular card game. Many experts believe almost every social deduction game since then draws inspiration from Mafia.
Modern versions have evolved to solve old problems. Early games like Mafia often required a non-playing referee. They also featured long periods where eliminated players could not participate. Newer designs try to remove these negative elements. The genre saw a massive rise in prominence during the late 2010s. In 2010, Margaret Robinson of Wired noted that Mafia had "infected" almost every major tech event. Video game adaptations also grew during this time. Custom maps for StarCraft: Brood War, such as Changeling and The Thing, helped spark this digital evolution. 
Video games have introduced new layers to the genre. Among Us was released in 2018 and became extremely popular in 2020. The COVID-19 pandemic helped its growth by allowing social interaction during distancing. One major improvement in Among Us was the addition of active tasks. Players must complete these tasks while searching for impostors. This differs from tabletop games that focus primarily on discussion. Other digital examples include Town of Salem and the Garry's Mod mode "Trouble in Terrorist Town." 
These games also create a "meta-gaming" social component. This happens when players play multiple rounds together. Players must think about how others acted in previous rounds. They must also consider how they might need to act in future rounds. This connects the games to broader social psychology and long-term strategy. The influence of social deduction even extends to television. Shows like The Mole and The Traitors use these exact concepts. These programs adapt the mechanics of hidden roles for a global audience. 
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