The rules of the game

You all know the game of werewolf no ?
And if this became real ?
If the game became a program where teenagers fight to the death?
They are twenty, five werewolf, three villagers and the rest are special, made cards to confuse players.
Discover the hidden face of these players and applaud winners weep for those who die.
The aim of the game is to convince others that you are not a werewolf to survive.
The game begins now!