Town of Salem

I learned about this neat little browser game recently from a popular Twitch stream. In it, 7 to 15 players are divided randomly into alignments - Town, Mafia, Serial Killers, Arsonists and Neutrals wherein they play a game of deception to keep their identities secret and oust and eliminate (usually by lynching) the other groups. Once only one group is remaining, that group wins the match.

There are a total number of 29 different classes to play as, and each have their own unique abilities that are typically usable during the Night phase.

The phases of a turn are as follows:

Discussion Phase: Players are free to chat in order to help or deceive each other.
Voting Phase: Players are given the option to vote against other players to put them on Trial.
Defense Phase: Players on Trial are given the chance to type their defense in chat.
Judgement Phase: Players vote Innocent or Guilty. If Guilty is the majority vote, the player on Trial is lynched. If Innocent is the majority vote, the player on Trial returns to the circle of players and the game proceeds.
Night Phase: Players use their class abilities which usually involve trying to save, kill, or find out the identity of another player.
Dead Phase: The game announces the players that were killed during the Night phase, and reveals any clues they left towards discovering the identity of other players.

These phases repeat until the match is over.

Custom aesthetic features like maps, icons, and pets are acquired by purchasing Town Points (coins) with real money, people using your referral link to play the game, win of the day bonus, or by unlocking achievements in the game.

I haven't actually played a match myself yet and have only watched gameplay of it, but it looks like it would be quite fun-- especially with friends. The game is not without minor flaws, in some random modes there can be an unbalance of a good/bad group making it near impossible for other teams to win, although you could say that's just the risk of choosing random. Another thing that can be frustrating to players is if your allies aren't paying attention and forget to vote or discuss things, it can easily lose you the match.

Good luck and have fun!