Town of Salem is a browser-based game that challenges players on their ability to convincingly lie as well as detect when other players are lying.
The game ranges from 7 to 15 players. These players are randomly divided into alignments - Town, Mafia, and Neutrals. If you are a Town member (the good guys) you must track down the Mafia and other villains before they kill you.
The catch? You don't know who is a Town member and who is a villain. If you are an evil role, such as a Serial Killer, you secretly murder town members in the veil of night and try to avoid getting caught.
Source: The Developer Website.